Gr 11 Physical Sciences: November Hard P(1)
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Questions and Answers

What is the significance of vector equality in two-dimensional vectors?

  • It means vectors can only be represented on the x-axis.
  • It means vectors can be positioned anywhere on the Cartesian plane without changing their physical meaning. (correct)
  • It means vectors must always start at the origin.
  • It means vectors can only be represented on the y-axis.

What is the purpose of specifying vector direction?

  • To simplify vector addition calculations.
  • To distinguish between vectors with the same magnitude. (correct)
  • To determine the magnitude of the vector.
  • To determine the resultant vector.

What is the difference between compass directions and bearings?

  • Compass directions are used in geography, while bearings are used in navigation.
  • Compass directions are used in navigation, while bearings are used in geography. (correct)
  • Compass directions are numerical, while bearings are descriptive.
  • Compass directions are measured clockwise from North, while bearings are measured anti-clockwise from North.

How are vectors typically added in two dimensions?

<p>Using both graphical and algebraic methods. (C)</p> Signup and view all the answers

What is the importance of perpendicular vectors in vector addition?

<p>They simplify calculations of resultant vectors. (C)</p> Signup and view all the answers

What is the purpose of the Cartesian plane in representing two-dimensional vectors?

<p>To provide a system for specifying vector directions. (B)</p> Signup and view all the answers

What is the significance of the resultant vector?

<p>It represents the combined effect of multiple vectors acting simultaneously. (C)</p> Signup and view all the answers

How are angles typically measured in two-dimensional vector representation?

<p>Anti-clockwise from the positive x-axis. (C)</p> Signup and view all the answers

What is the primary purpose of drawing a force diagram?

<p>To visualize all the forces acting on a system (A)</p> Signup and view all the answers

What is the coefficient of kinetic friction dependent on?

<p>The normal force and the given pair of surfaces (D)</p> Signup and view all the answers

What is the net force acting on an object when it is in a state of uniform motion?

<p>Zero (C)</p> Signup and view all the answers

In which direction does the normal force act?

<p>Perpendicular to the surface (A)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify calculations involving inclined planes (C)</p> Signup and view all the answers

What is the unit of the coefficient of friction?

<p>Dimensionless (C)</p> Signup and view all the answers

What is the formula to calculate the kinetic frictional force?

<p>f_k = μ_k N (C)</p> Signup and view all the answers

What is the purpose of drawing a free-body diagram?

<p>To visualize all the forces acting on an object (B)</p> Signup and view all the answers

What is the mathematical representation of Newton's Second Law of Motion?

<p>F_net = ma (B)</p> Signup and view all the answers

What is the definition of inertia?

<p>The property of an object to continue in its current state of motion (A)</p> Signup and view all the answers

What is the definition of apparent weight?

<p>The normal force experienced by an object in a non-inertial frame of reference (C)</p> Signup and view all the answers

Which force acts perpendicular to the surface of an object resting on it?

<p>Normal force (B)</p> Signup and view all the answers

What is the formula for the kinetic frictional force?

<p>f_k = μ_k N (D)</p> Signup and view all the answers

What is the purpose of a free body diagram?

<p>To represent the object of interest as a dot, with all forces acting on it drawn as arrows (A)</p> Signup and view all the answers

What is the direction of the force of gravity between two objects?

<p>Attractive (A)</p> Signup and view all the answers

What is the formula for the maximum static frictional force?

<p>f_max,s = μ_s N (B)</p> Signup and view all the answers

What is the definition of Newton's Third Law of Motion?

<p>For every action, there is an equal and opposite reaction (B)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To deal with inclined planes (C)</p> Signup and view all the answers

What is the definition of the resultant force?

<p>The vector sum of all the forces acting on an object (D)</p> Signup and view all the answers

What is the condition for an object to be in equilibrium?

<p>The sum of the forces acting on it and the resultant force are equal to zero (B)</p> Signup and view all the answers

What is the condition for a closed vector diagram?

<p>The vectors drawn tail-to-head result in a polygon that returns to the origin (C)</p> Signup and view all the answers

What is the formula to find the magnitude of the resultant vector for perpendicular vectors?

<p>R = √(Rx^2 + Ry^2) (A)</p> Signup and view all the answers

What is the purpose of resolving a vector into its components?

<p>To break down a vector into simpler vectors that can be added easily (C)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

<p>Newton (N) (A)</p> Signup and view all the answers

What is the definition of a force?

<p>A force is anything that can cause a change to objects (C)</p> Signup and view all the answers

What is the difference between a contact force and a non-contact force?

<p>A contact force requires touch to cause a change, while a non-contact force does not (B)</p> Signup and view all the answers

What is the purpose of the tail-to-head method for adding vectors?

<p>To add multiple vectors originating from the same point (D)</p> Signup and view all the answers

What is the formula to find the horizontal component of a vector?

<p>Rx = R cos(θ) (A)</p> Signup and view all the answers

What is the advantage of using components to find the resultant vector?

<p>It allows for easier addition of vectors by breaking them down into simpler components (A)</p> Signup and view all the answers

What is the main difference between Coulomb's law and Newton's universal law of gravitation?

<p>The type of particles involved (B)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them doubles?

<p>It decreases by a factor of four (A)</p> Signup and view all the answers

What is the significance of the angle θ in resolving vectors into components?

<p>It is the angle measured counter-clockwise from the positive x-axis (C)</p> Signup and view all the answers

What is the value of the electrostatic constant in free space?

<p>9.0 × 10^9 N·m^2/C^2 (D)</p> Signup and view all the answers

What is the mathematical form of Coulomb's law?

<p>F = k(Q1 × Q2)/r^2 (C)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's universal law of gravitation?

<p>They both describe forces that are inversely proportional to the square of the distance (D)</p> Signup and view all the answers

What is the concept that helps explain how charges influence each other across space?

<p>Electric field (D)</p> Signup and view all the answers

What is the relationship between the magnitude of the charges and the electrostatic force between them?

<p>The force increases with increasing charge magnitude (A)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them decreases?

<p>It increases by a factor of four (D)</p> Signup and view all the answers

What is the physical quantity represented by the symbol Q in Coulomb's law?

<p>Magnitude of the charge (C)</p> Signup and view all the answers

What is the similarity between the mathematical forms of Coulomb's law and Newton's law of gravitation?

<p>They both involve forces that are inversely proportional to the square of the distance (D)</p> Signup and view all the answers

What is the unit of gravitational constant G?

<p>N·m²·kg⁻² (B)</p> Signup and view all the answers

What is the direction of the gravitational force between two objects?

<p>Along the line connecting the centers of the two masses (C)</p> Signup and view all the answers

What is the direction of the electric field at a point in space?

<p>The direction in which a positive test charge would move if placed at that point (C)</p> Signup and view all the answers

What is the relationship between weight and mass?

<p>Weight is a vector quantity, and mass is a scalar quantity (A)</p> Signup and view all the answers

What happens to the force experienced by a test charge as it moves further away from the source charge?

<p>The force experienced by the test charge decreases with distance (B)</p> Signup and view all the answers

What is the direction of the electric field lines around a positive charge?

<p>Away from the positive charge (A)</p> Signup and view all the answers

In what situation does an object experience weightlessness?

<p>When it is in free fall or orbit (A)</p> Signup and view all the answers

What is the effect of the magnitude of the charge on the electric field?

<p>The electric field is stronger for a greater magnitude of charge (B)</p> Signup and view all the answers

What is the similarity between Coulomb's law and Newton's law of universal gravitation?

<p>Both are inverse-square laws (D)</p> Signup and view all the answers

What is the unit of electrostatic constant k?

<p>N·m²/C² (C)</p> Signup and view all the answers

What is the direction of the electric field lines around a negative charge?

<p>Towards the negative charge (C)</p> Signup and view all the answers

What happens to the electric field lines when two positive charges of equal magnitude are placed next to each other?

<p>The electric field lines repel from both charges, creating a region of zero net force (C)</p> Signup and view all the answers

What is the primary difference between the magnetic field inside and outside a solenoid?

<p>The magnetic field strength is significantly weaker outside (A)</p> Signup and view all the answers

What is the relationship between the magnitude of the electrostatic force and the distance between the charges?

<p>The force is inversely proportional to the square of the distance (D)</p> Signup and view all the answers

What is the difference between mass and weight?

<p>Mass is the amount of matter in an object, while weight is the force of gravity on an object (D)</p> Signup and view all the answers

What is the primary function of electromagnets?

<p>To maximize the magnetic field strength and control it (C)</p> Signup and view all the answers

What is the effect of the configuration of two unlike charges on the electric field lines?

<p>The electric field lines start from the positive charge and end at the negative charge (B)</p> Signup and view all the answers

What is the purpose of comparative problems in physics?

<p>To relate a quantity in terms of another known quantity (B)</p> Signup and view all the answers

What is the primary concern regarding power lines carrying electric current?

<p>The impact on the environment, particularly birds (C)</p> Signup and view all the answers

What is the effect of the magnitude of the charges on the electric field lines when two charges of different magnitudes are placed next to each other?

<p>The electric field lines are more influenced by the charge with the greater magnitude (B)</p> Signup and view all the answers

What is the purpose of electric field lines?

<p>To show the strength and direction of the electric field (D)</p> Signup and view all the answers

What is the primary factor that affects the magnetic flux through a loop?

<p>The angle between the magnetic field and the normal to the loop (C)</p> Signup and view all the answers

What is the significance of Charles-Augustin de Coulomb's work?

<p>He discovered the electrostatic force and developed Coulomb's law (A)</p> Signup and view all the answers

What is a key convention when drawing electric field lines?

<p>Field lines are drawn tangential to a charge or charged surface (D)</p> Signup and view all the answers

What is the purpose of Faraday's Law of Electromagnetic Induction?

<p>To describe the relationship between electric and magnetic fields (C)</p> Signup and view all the answers

What is the direction of the induced current in a conductor when a south pole of a magnet approaches a loop?

<p>In the opposite direction to the magnetic field of the south pole (B)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule in determining the direction of induced current?

<p>To determine the direction of the induced current (A)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (C)</p> Signup and view all the answers

What is the effect of a stationary magnet on a nearby wire?

<p>It does not induce any voltage across the wire (C)</p> Signup and view all the answers

What is the purpose of Lenz's Law in Faraday's Law of Electromagnetic Induction?

<p>To indicate the direction of the induced emf (D)</p> Signup and view all the answers

What is the unit of energy that is typically used to calculate the cost of electricity?

<p>Kilowatt-hours (D)</p> Signup and view all the answers

How do you convert power from watts to kilowatts?

<p>Divide by 1000 (A)</p> Signup and view all the answers

What is the formula to calculate the cost of running an appliance?

<p>Cost = Power (kW) × Time (hours) × Cost per kWh (D)</p> Signup and view all the answers

What is the purpose of understanding the principles of electrical power and energy?

<p>To estimate the cost of electricity bills based on usage patterns (B)</p> Signup and view all the answers

What is the typical unit of time used in calculations of energy consumption?

<p>Hours (C)</p> Signup and view all the answers

What is the benefit of understanding the principles of electrical power and energy?

<p>It aids in designing and managing electrical circuits effectively (D)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current flow (D)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>Newtons per coulomb (N·C⁻¹) (A)</p> Signup and view all the answers

What is the relationship between the strength of the magnetic field and the current?

<p>A stronger current results in a stronger magnetic field (A)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a straight wire?

<p>Concentric circles (A)</p> Signup and view all the answers

What is the direction of the magnetic field lines inside a loop of wire?

<p>Through the loop (A)</p> Signup and view all the answers

What is the formula for electric field strength?

<p>E = F/q (D)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a solenoid?

<p>Uniform and resembling a bar magnet (D)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule?

<p>To determine the direction of the magnetic field (C)</p> Signup and view all the answers

What is the symbol for an arrow coming out of the page in visualizing magnetic fields?

<p>⊙ (C)</p> Signup and view all the answers

What is the direction of the magnetic field lines outside a loop of wire?

<p>Out of the loop (A)</p> Signup and view all the answers

In a solenoid, what is the direction of the induced current determined by?

<p>The Right Hand Rule (A)</p> Signup and view all the answers

What is the principle behind the operation of electrical generators?

<p>Electromagnetic induction (A)</p> Signup and view all the answers

What is the purpose of Lenz's Law?

<p>To ensure the direction of the induced emf always opposes the change that caused it (A)</p> Signup and view all the answers

What is the relationship between voltage, current, and resistance in a circuit according to Ohm's Law?

<p>I = V/R (A)</p> Signup and view all the answers

What is the characteristic of a graph of current vs. voltage for an ohmic conductor?

<p>A straight line (C)</p> Signup and view all the answers

What is the total resistance in a series circuit?

<p>The sum of the resistances of all the resistors (B)</p> Signup and view all the answers

What is the current through each component in a series circuit?

<p>The same (A)</p> Signup and view all the answers

What is the characteristic of the voltage across each resistor in a series circuit?

<p>Proportional to its resistance (A)</p> Signup and view all the answers

What is the primary difference between ohmic and non-ohmic conductors?

<p>Their resistance changes with temperature (C)</p> Signup and view all the answers

What is the purpose of using Ohm's Law in circuit analysis?

<p>To analyze circuits with resistors in series or parallel (C)</p> Signup and view all the answers

What is the total resistance in a parallel circuit equal to?

<p>1/R1 + 1/R2 + ... + 1/Rn (D)</p> Signup and view all the answers

What is the total current in a series circuit equal to?

<p>I1 = I2 = I3 (A)</p> Signup and view all the answers

What is the unit of electrical power?

<p>Joules per second (J/s) (A)</p> Signup and view all the answers

What is the formula for calculating power in an electrical circuit?

<p>P = I × V (C)</p> Signup and view all the answers

What is the formula for calculating electrical energy?

<p>E = P × t (B)</p> Signup and view all the answers

What is the purpose of combining series and parallel circuits?

<p>To analyze complex circuits with multiple setups (C)</p> Signup and view all the answers

What is the relationship between power and voltage in an electrical circuit?

<p>Power is directly proportional to the voltage (D)</p> Signup and view all the answers

What is the purpose of using Ohm's Law in power calculations?

<p>To derive equivalent expressions for power (C)</p> Signup and view all the answers

What is the unit of electrical energy often used in household and commercial contexts?

<p>Kilowatt-hours (kWh) (C)</p> Signup and view all the answers

What is the relationship between power and current in an electrical circuit?

<p>Power is directly proportional to the square of the current (C)</p> Signup and view all the answers

What is the condition for a vector diagram to be closed?

<p>When the resultant vector has zero magnitude (B)</p> Signup and view all the answers

What is the purpose of resolving a vector into its components?

<p>To simplify the addition of vectors (A)</p> Signup and view all the answers

What is the formula to find the magnitude of the resultant vector for perpendicular vectors?

<p>R = sqrt(R_x^2 + R_y^2) (B)</p> Signup and view all the answers

What is the main difference between contact forces and non-contact forces?

<p>Contact forces require direct physical contact (D)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

<p>Newton (N) (A)</p> Signup and view all the answers

What is the purpose of the tail-to-head method for adding vectors?

<p>To simplify the addition of vectors (C)</p> Signup and view all the answers

What is the formula to find the horizontal component of a vector?

<p>R_x = R cos(θ) (A)</p> Signup and view all the answers

What is the advantage of using components to find the resultant vector?

<p>It is more accurate than other methods (A)</p> Signup and view all the answers

What is the significance of the angle θ in resolving vectors into components?

<p>It is the angle between the vector and the x-axis (D)</p> Signup and view all the answers

What is the definition of a force?

<p>A push or pull that causes an object to change its motion (A)</p> Signup and view all the answers

What is the primary reason why vectors can be positioned anywhere on the Cartesian plane?

<p>Because their magnitude and direction are preserved (B)</p> Signup and view all the answers

Which of the following is a characteristic of perpendicular vectors?

<p>They form a right angle when originating from the same point (A)</p> Signup and view all the answers

What is the primary advantage of using bearings to specify vector directions?

<p>They provide a numerical way to specify directions (B)</p> Signup and view all the answers

What is the purpose of the tail-to-head method in vector addition?

<p>To add vectors graphically (A)</p> Signup and view all the answers

What is the significance of the direction of a vector in two-dimensional vector representation?

<p>It is essential for accurate representation and calculation (A)</p> Signup and view all the answers

What is the relationship between the x-axis and the y-axis on the Cartesian plane?

<p>They are perpendicular to each other (B)</p> Signup and view all the answers

What is the result of adding vectors in two dimensions using the same principles as in one dimension?

<p>A resultant vector representing the combined effect of multiple vectors (B)</p> Signup and view all the answers

What is the primary purpose of specifying vector directions using angles measured from the positive x-axis?

<p>To provide a clear and accurate representation of the vector (D)</p> Signup and view all the answers

A force of 50 N is acting at an angle of 30° to the horizontal. What is the magnitude of the horizontal component of the force?

<p>43.3 N (A)</p> Signup and view all the answers

A 10 kg object is being pulled up an inclined plane with a force of 50 N. If the plane is inclined at an angle of 30° to the horizontal, what is the magnitude of the normal force on the object?

<p>49.3 N (B)</p> Signup and view all the answers

A resultant force of 10 N is acting on an object. If the object has a mass of 5 kg, what is its acceleration?

<p>2 m/s² (A)</p> Signup and view all the answers

A force diagram is a sketch showing all the forces acting on a system, represented by arrows. What is the purpose of labeling each force clearly and indicating the direction and the object on which it acts?

<p>To distinguish between the different forces and prevent confusion (D)</p> Signup and view all the answers

A 5 kg object is moving up a rough inclined plane with a coefficient of kinetic friction of 0.2. If the plane is inclined at an angle of 20° to the horizontal, what is the magnitude of the kinetic frictional force?

<p>7.35 N (C)</p> Signup and view all the answers

A free-body diagram is used to represent the forces acting on an object. What is the significance of representing the object as a dot in a free-body diagram?

<p>To simplify the diagram and focus on the forces (D)</p> Signup and view all the answers

A force of 20 N is acting on an object at an angle of 45° to the horizontal. What is the magnitude of the vertical component of the force?

<p>14.14 N (A)</p> Signup and view all the answers

A 10 kg object is being pulled with a force of 50 N up a rough inclined plane. If the plane is inclined at an angle of 30° to the horizontal and the coefficient of kinetic friction is 0.2, what is the acceleration of the object?

<p>1.47 m/s² (A)</p> Signup and view all the answers

A force diagram is used to represent the forces acting on an object. What is the significance of using arrows to show the direction of the forces?

<p>To indicate the direction of the forces and prevent confusion (C)</p> Signup and view all the answers

A 5 kg object is at rest on a horizontal surface. What is the magnitude of the normal force on the object?

<p>49 N (D)</p> Signup and view all the answers

What is the primary force responsible for the acceleration of an object down an inclined plane?

<p>Component of gravitational force parallel to the slope (C)</p> Signup and view all the answers

In a scenario involving vertical motion, what determines the direction of the net force?

<p>The difference between the gravitational force and the tension force (C)</p> Signup and view all the answers

What is the effect of acceleration on apparent weight?

<p>It increases the apparent weight (B)</p> Signup and view all the answers

What is the characteristic of the forces involved in an action-reaction pair?

<p>They have equal magnitude but opposite direction (C)</p> Signup and view all the answers

What is the condition for an object to be in equilibrium?

<p>The sum of the forces acting on it is equal to zero (C)</p> Signup and view all the answers

What is the purpose of drawing a free-body diagram?

<p>To identify the forces acting on an object (A)</p> Signup and view all the answers

What is the formula to calculate the component of the gravitational force parallel to the slope?

<p>F_g sin(θ) (D)</p> Signup and view all the answers

What is the definition of Newton's Law of Universal Gravitation?

<p>Every point mass attracts every other point mass by a force directed along the line connecting the two (C)</p> Signup and view all the answers

What is the primary difference between static friction and kinetic friction?

<p>Static friction acts on stationary objects, while kinetic friction acts on moving objects (B)</p> Signup and view all the answers

What is the role of the normal force in resolving forces into components?

<p>It is the force perpendicular to the slope (C)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>Newtons per coulomb (N·C⁻¹) (C)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current flow (B)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a loop of wire?

<p>A pattern that converges through the loop (D)</p> Signup and view all the answers

What is the strength of the magnetic field proportional to?

<p>The current flowing through the wire (A)</p> Signup and view all the answers

What is the symbol used to represent an arrow coming out of the page?

<p>⊙ (C)</p> Signup and view all the answers

What is the shape of the magnetic field lines inside a solenoid?

<p>A strong and uniform field (C)</p> Signup and view all the answers

What is the direction of the force experienced by a test charge in an electric field?

<p>Parallel to the direction of the electric field (D)</p> Signup and view all the answers

What is the formula for the electric field strength?

<p>E = kQ/r (B), E = F/q (C)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule?

<p>To determine the direction of the magnetic field (D)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a straight wire?

<p>Concentric circles (D)</p> Signup and view all the answers

What is the primary reason why astronauts in space experience weightlessness?

<p>Because they are in continuous free fall around the Earth (D)</p> Signup and view all the answers

What is the direction of the electric field at a point in space where a positive test charge is placed near a negative charge?

<p>Towards the negative charge (C)</p> Signup and view all the answers

What is the relationship between the magnitude of the charges and the electrostatic force between them?

<p>The electrostatic force is directly proportional to the product of the charges (A)</p> Signup and view all the answers

What is the significance of the closeness of electric field lines around a charge?

<p>The field is stronger (C)</p> Signup and view all the answers

What is the main difference between Coulomb's law and Newton's universal law of gravitation?

<p>Coulomb's law is only applicable to point-like charges, while Newton's law is applicable to all objects with mass (D)</p> Signup and view all the answers

What happens to the electric field lines around two positive charges of equal magnitude placed next to each other?

<p>They repel each other (D)</p> Signup and view all the answers

What is the physical quantity represented by the symbol m in the equation F = mg?

<p>Mass (D)</p> Signup and view all the answers

What is the significance of the gravitational constant G in the equation F = G(m_1 m_2)/d^2?

<p>It represents the proportionality constant between the gravitational force and the product of the masses (B)</p> Signup and view all the answers

What is the direction of the force experienced by a positive test charge placed near a positive charge?

<p>Away from the positive charge (B)</p> Signup and view all the answers

How do electric field lines around a negative charge differ from those around a positive charge?

<p>They point towards the charge (D)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's universal law of gravitation?

<p>Both are inverse-square laws (D)</p> Signup and view all the answers

What is the effect of the magnitude of the charges on the electric field lines around them?

<p>The electric field lines are stronger for larger charges (B)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the distance between two point-like charges?

<p>The electrostatic force is inversely proportional to the square of the distance between the charges (B)</p> Signup and view all the answers

What is the purpose of drawing electric field lines?

<p>To represent the force experienced by a test charge (C)</p> Signup and view all the answers

What is the unit of the gravitational constant G?

<p>N·m^2·kg^-2 (D)</p> Signup and view all the answers

What is the significance of the symbol k in the equation F = k(Q_1 Q_2)/r^2?

<p>It represents the proportionality constant between the electrostatic force and the product of the charges (B)</p> Signup and view all the answers

What is the difference between the electric field lines around a positive charge and a negative charge?

<p>The lines point away from a positive charge and towards a negative charge (B)</p> Signup and view all the answers

What is the concept that helps explain how charges influence each other across space?

<p>Electromagnetic field (D)</p> Signup and view all the answers

What happens to the electric field lines around two unlike charges placed next to each other?

<p>They attract each other (C)</p> Signup and view all the answers

What is the relationship between the distance between two charges and the electrostatic force between them?

<p>The force decreases with distance (A)</p> Signup and view all the answers

What is the primary purpose of Lenz's Law in electromagnetic induction?

<p>To oppose the change in magnetic flux (B)</p> Signup and view all the answers

What is the unit of resistance in a circuit?

<p>Ohms (B)</p> Signup and view all the answers

What is the characteristic of an ohmic conductor?

<p>Resistance is constant at a given temperature (A)</p> Signup and view all the answers

What is the formula for calculating the total resistance in a series circuit?

<p>R_s = R_1 + R_2 + R_3 + … + R_n (C)</p> Signup and view all the answers

What is the purpose of using Ohm's Law in a circuit?

<p>To analyze circuits with resistors in series or parallel (A)</p> Signup and view all the answers

What is the characteristic of a non-ohmic conductor?

<p>Resistance changes with temperature (D)</p> Signup and view all the answers

What is the direction of the induced current in a solenoid?

<p>Opposite to the change in magnetic flux (B)</p> Signup and view all the answers

What is the application of electromagnetic induction in electrical generators?

<p>To convert mechanical energy into electrical energy (C)</p> Signup and view all the answers

What is the relationship between the voltage and current in a circuit according to Ohm's Law?

<p>Current is directly proportional to voltage (C)</p> Signup and view all the answers

What is the type of conductor that has a constant resistance when the voltage is varied across it or the current through it is increased?

<p>Ohmic conductor (D)</p> Signup and view all the answers

What is the primary reason why Coulomb's law and Newton's universal law of gravitation exhibit similar mathematical forms?

<p>Because they both describe forces that are inversely proportional to the distance between the particles (D)</p> Signup and view all the answers

What is the effect on the electrostatic force between two charges when the distance between them is halved?

<p>The force increases by a factor of four (A)</p> Signup and view all the answers

What is the physical quantity represented by the symbol k in Coulomb's law?

<p>The electrostatic constant (C)</p> Signup and view all the answers

What is the fundamental principle in physics that Coulomb's law and Newton's universal law of gravitation both illustrate?

<p>Forces diminish with the square of the distance between interacting particles (B)</p> Signup and view all the answers

What is the significance of the concept of electric field in understanding the behavior of charged particles?

<p>It helps explain how charges influence each other across space (D)</p> Signup and view all the answers

What is the relationship between the magnitude of the charges and the electrostatic force between them?

<p>The force is directly proportional to the magnitude of the charges (D)</p> Signup and view all the answers

What is the unit of the electrostatic constant k in free space?

<p>N·m^2/C^2 (B)</p> Signup and view all the answers

What is the unit of energy consumed by an appliance, which is used to calculate the cost of electricity?

<p>Kilowatt-hours (A)</p> Signup and view all the answers

What is the formula to calculate the cost of running an appliance?

<p>Cost = Power (kW) × Time (hours) × Cost per kWh (B)</p> Signup and view all the answers

What is the effect on the electrostatic force between two charges when the magnitude of one of the charges is doubled?

<p>The force increases by a factor of two (B)</p> Signup and view all the answers

What is the purpose of converting time from minutes or seconds to hours?

<p>To calculate the total energy consumption (A)</p> Signup and view all the answers

What is the main difference between the magnetic field outside and inside a solenoid?

<p>The magnetic field is weaker outside the solenoid (A)</p> Signup and view all the answers

What is the mathematical form of Coulomb's law that describes the electrostatic force between two point charges?

<p>F = k(Q1 × Q2)/r^2 (B)</p> Signup and view all the answers

What is the primary purpose of electromagnets?

<p>To maximize the magnetic field strength (D)</p> Signup and view all the answers

What is the benefit of understanding the principles of electrical power and energy?

<p>It helps in designing and managing electrical circuits effectively (A)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's universal law of gravitation that describes the relationship between the forces and the distance between the particles?

<p>They both describe forces that diminish with the square of the distance between the particles (B)</p> Signup and view all the answers

What is the conversion factor to convert power from watts to kilowatts?

<p>Divide by 1000 (A)</p> Signup and view all the answers

What is the effect of a moving magnet on a wire?

<p>A voltage is generated across the wire only when the magnet is moving (B)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (A)</p> Signup and view all the answers

What is the sequence of steps to find the cost of running an appliance?

<ol> <li>Determine the power rating, 2. Multiply by the time, 3. Multiply by the cost per kWh (A)</li> </ol> Signup and view all the answers

What is the direction of the induced current in a conductor when a south pole of a magnet approaches?

<p>The current flows in the opposite direction to the magnetic field (C)</p> Signup and view all the answers

What is the effect of power lines on the environment?

<p>They can cause birds to collide with them, leading to fatalities (A)</p> Signup and view all the answers

What is the significance of Faraday's Law of Electromagnetic Induction?

<p>It is crucial for the generation of electricity (B)</p> Signup and view all the answers

What is the formula for the magnetic flux through a loop of area A in the presence of a uniform magnetic field B?

<p>φ = B × A cos(θ) (A)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule in determining the direction of the magnetic field?

<p>To determine the direction of the magnetic field (A)</p> Signup and view all the answers

What is the effect of varying the current in an electromagnet?

<p>The magnetic field strength can be controlled (A)</p> Signup and view all the answers

What is the formula for calculating the total resistance in a parallel circuit?

<p>$\frac{1}{R_p} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + ... + \frac{1}{R_n}$ (D)</p> Signup and view all the answers

What is the unit of measurement for power?

<p>Watt (A)</p> Signup and view all the answers

What is the formula for calculating electrical energy?

<p>$E = P \cdot t$ (C)</p> Signup and view all the answers

What is the purpose of using Ohm's Law in calculating power?

<p>To derive equivalent expressions for power when the current and resistance are known (D)</p> Signup and view all the answers

What is the advantage of using the formula P = I^2 * R to calculate power?

<p>It is useful when the current and resistance are known (B)</p> Signup and view all the answers

What happens to the power dissipated by a circuit when the voltage across it increases?

<p>It increases (C)</p> Signup and view all the answers

What is the unit of measurement for electrical energy in household and commercial contexts?

<p>Kilowatt-hour (C)</p> Signup and view all the answers

What is the purpose of combining series and parallel circuits in an analysis?

<p>To calculate the total resistance in a circuit (C)</p> Signup and view all the answers

What is the relationship between power and energy?

<p>Power is the rate of energy transfer (D)</p> Signup and view all the answers

What is the purpose of using the formula P = V^2 / R to calculate power?

<p>To find the power when the voltage and resistance are known (C)</p> Signup and view all the answers

What is a characteristic of vectors represented on the Cartesian plane?

<p>Their magnitude and direction are preserved regardless of their position. (B)</p> Signup and view all the answers

What is the purpose of using perpendicular vectors in vector addition?

<p>To simplify calculations of resultant vectors. (B)</p> Signup and view all the answers

How are angles typically measured in two-dimensional vector representation?

<p>Anti-clockwise from the positive x-axis. (C)</p> Signup and view all the answers

What is the significance of the direction of a vector?

<p>It is essential for accurate representation and calculation. (D)</p> Signup and view all the answers

What is the purpose of bearings in vector representation?

<p>To provide a numerical way to specify directions. (A)</p> Signup and view all the answers

What is the difference between the graphical and algebraic methods of adding vectors?

<p>The graphical method uses the tail-to-head method, while the algebraic method uses components. (A)</p> Signup and view all the answers

What is the resultant vector in two-dimensional vector addition?

<p>The combined effect of multiple vectors acting simultaneously. (D)</p> Signup and view all the answers

What is the significance of vector representation on the Cartesian plane?

<p>It is used to represent vectors in two dimensions. (A)</p> Signup and view all the answers

What is the primary advantage of using the tail-to-head method for adding vectors?

<p>It can be used to add more than two vectors (A)</p> Signup and view all the answers

What is the significance of a closed vector diagram?

<p>It indicates a resultant vector with zero magnitude (D)</p> Signup and view all the answers

What is the purpose of resolving a vector into its components?

<p>To simplify the calculation of the resultant vector's magnitude (D)</p> Signup and view all the answers

What is the mathematical form of the formula used to find the magnitude of the resultant vector for perpendicular vectors?

<p>R = √(R_x^2 + R_y^2) (B)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

<p>Newton (A)</p> Signup and view all the answers

What is the primary difference between a contact force and a non-contact force?

<p>Contact forces must touch an object to cause a change (A)</p> Signup and view all the answers

What is the purpose of using trigonometric identities when resolving vectors into components?

<p>To find the horizontal and vertical components of the vector (A)</p> Signup and view all the answers

What is the significance of the angle θ in resolving vectors into components?

<p>It is the angle measured counter-clockwise from the positive x-axis (A)</p> Signup and view all the answers

What is the advantage of using components to find the resultant vector?

<p>It helps to simplify the calculation of the resultant vector's magnitude (C)</p> Signup and view all the answers

What is the definition of a force?

<p>Anything that can cause a change to an object (B)</p> Signup and view all the answers

What is the direction of the gravitational force acting on an object on an inclined plane?

<p>Parallel to the slope (A)</p> Signup and view all the answers

When a lift accelerates downwards, what is the relationship between the tension and the gravitational force?

<p>The tension is less than the gravitational force (A)</p> Signup and view all the answers

What is the resultant force acting on an object in equilibrium?

<p>Zero (C)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify the force diagram (A)</p> Signup and view all the answers

What is the direction of the normal force acting on an object resting on a surface?

<p>Perpendicular to the surface (A)</p> Signup and view all the answers

What is the relationship between the static frictional force and the normal force?

<p>The static frictional force is proportional to the normal force (D)</p> Signup and view all the answers

What is the force that arises between objects due to their mass and is always attractive?

<p>Gravity (D)</p> Signup and view all the answers

What is the purpose of a free-body diagram?

<p>All of the above (D)</p> Signup and view all the answers

What is the condition for a force to be a contact force?

<p>It acts through physical contact (D)</p> Signup and view all the answers

What is the significance of the coefficient of friction in determining the kinetic frictional force?

<p>It is a constant for a given pair of surfaces (A)</p> Signup and view all the answers

What is the relationship between the gravitational force and the distance between two objects?

<p>The gravitational force is inversely proportional to the square of the distance between the two objects (C)</p> Signup and view all the answers

What is the dependence of the electrostatic force between two point charges on the magnitudes of the charges?

<p>Directly proportional to the product of the charges (D)</p> Signup and view all the answers

What is the difference between mass and weight?

<p>Mass is a measure of the amount of matter in an object, while weight is a measure of the gravitational force on an object (A)</p> Signup and view all the answers

What is the relationship between the distance between two charges and the electrostatic force between them?

<p>The force decreases with the square of the distance (A)</p> Signup and view all the answers

What is the significance of the gravitational acceleration near the surface of the Earth?

<p>It is the same for all objects regardless of their mass (B)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's universal law of gravitation?

<p>Both laws describe forces that are inversely proportional to the square of the distance between particles (B)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the distance between two charges?

<p>The electrostatic force is inversely proportional to the square of the distance between the two charges (C)</p> Signup and view all the answers

What is the significance of the electrostatic constant in Coulomb's law?

<p>It is a proportionality constant that relates the electrostatic force to the product of the charges and the distance between them (B)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them triples?

<p>The force decreases by a factor of nine (B)</p> Signup and view all the answers

What is the significance of Coulomb's law?

<p>It describes the electrostatic force between two charges (A)</p> Signup and view all the answers

What is the difference between the gravitational force and the electrostatic force?

<p>The gravitational force is a force between masses, while the electrostatic force is a force between charges (A)</p> Signup and view all the answers

What is the physical quantity represented by the symbol Q in Coulomb's law?

<p>Magnitude of the charges (B)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's universal law of gravitation?

<p>They are both inverse-square laws (D)</p> Signup and view all the answers

What is the mathematical form of Coulomb's law?

<p>F = k(Q1 * Q2)/r^2 (B)</p> Signup and view all the answers

What is the significance of the value of the gravitational constant G?

<p>It is a measure of the strength of the gravitational force between two objects (D)</p> Signup and view all the answers

What is the concept that helps explain how charges influence each other across space?

<p>Electric field (C)</p> Signup and view all the answers

What is the relationship between the weight of an object and its mass?

<p>The weight of an object is proportional to its mass (C)</p> Signup and view all the answers

What is the similarity between the mathematical forms of Coulomb's law and Newton's law of gravitation?

<p>Both laws describe forces that are inversely proportional to the square of the distance between particles (A)</p> Signup and view all the answers

What is the value of the electrostatic constant in free space?

<p>9.0 x 10^9 N·m^2/C^2 (A)</p> Signup and view all the answers

What is the significance of the concept of weightlessness?

<p>It is a state where an object is in continuous free fall around the Earth (C)</p> Signup and view all the answers

What is the primary difference between the magnetic field inside and outside a solenoid?

<p>The field inside is stronger and more concentrated, while the field outside is weaker and more dispersed. (B)</p> Signup and view all the answers

What is the primary purpose of electromagnets in practical applications?

<p>To control the strength of the magnetic field by varying the current. (B)</p> Signup and view all the answers

What is the effect of power lines on the environment, according to studies?

<p>They have a significant impact on the environment, particularly on certain bird species. (B)</p> Signup and view all the answers

What is the primary concern regarding the magnetic fields generated by power lines?

<p>They are not considered harmful to humans at levels commonly encountered, but ongoing research and debate continue regarding the long-term effects. (B)</p> Signup and view all the answers

What is the definition of magnetic flux?

<p>The magnetic field strength multiplied by the area of the loop, cosined by the angle between the magnetic field and the normal to the loop. (C)</p> Signup and view all the answers

What is the direction of the induced emf in a loop, according to Lenz's Law?

<p>It is in the opposite direction to the change in magnetic flux. (B)</p> Signup and view all the answers

What is the effect of an approaching south pole on the induced current in a loop?

<p>It generates a current that repels the south pole. (B)</p> Signup and view all the answers

What is the formula for the induced emf in a loop, according to Faraday's Law of Electromagnetic Induction?

<p>E = -NΔφ/Δt (B)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (A)</p> Signup and view all the answers

What is the condition for the generation of an induced emf in a loop?

<p>The magnetic field must be changing. (D)</p> Signup and view all the answers

What is the purpose of Lenz's Law?

<p>To describe the direction of the induced current (D)</p> Signup and view all the answers

What is the unit of resistance in a circuit?

<p>Ohms (B)</p> Signup and view all the answers

What is the characteristic of a non-ohmic conductor?

<p>The resistance changes with temperature (A)</p> Signup and view all the answers

What is the formula for calculating the total resistance in a series circuit?

<p>R_s = R_1 + R_2 + R_3 + ... + R_n (D)</p> Signup and view all the answers

What is the purpose of electromagnetic induction?

<p>To convert mechanical energy into electrical energy (B)</p> Signup and view all the answers

What is the definition of self-induction?

<p>The induction of a current in the same wire (D)</p> Signup and view all the answers

What is the characteristic of an ohmic conductor?

<p>The current is directly proportional to the voltage (C)</p> Signup and view all the answers

What is the formula for calculating the current through a conductor?

<p>I = V/R (D)</p> Signup and view all the answers

What is the direction of the electric field at a point in space where a positive test charge is placed?

<p>Away from the positive charge (C)</p> Signup and view all the answers

What is the purpose of a solenoid in electromagnetic induction?

<p>To generate a magnetic field (B)</p> Signup and view all the answers

What is the purpose of drawing electric field lines?

<p>To show the direction and relative strength of the electric field (C)</p> Signup and view all the answers

What is the direction of the induced current in a solenoid?

<p>The opposite direction of the change in magnetic flux (D)</p> Signup and view all the answers

What happens to the electric field lines around a positive charge?

<p>They point away from the charge (B)</p> Signup and view all the answers

What is the relationship between the magnitude of the charge and the strength of the electric field?

<p>The greater the magnitude of the charge, the stronger the electric field (A)</p> Signup and view all the answers

What is the direction of the electric field around two like charges of equal magnitude?

<p>The electric field lines point away from both charges (D)</p> Signup and view all the answers

What is the significance of the electric field lines being closer together?

<p>The electric field is stronger (B)</p> Signup and view all the answers

What is the direction of the electric field around a negative charge?

<p>The electric field lines point towards the negative charge (B)</p> Signup and view all the answers

What is the purpose of the electric field lines in a configuration of two unlike charges?

<p>To show the direction of the force that a positive test charge would experience (A)</p> Signup and view all the answers

What happens to the electric field lines when the magnitudes of the charges are different?

<p>The electric field lines are more influenced by the charge with the greater magnitude (C)</p> Signup and view all the answers

What is the significance of the electric field lines not touching or crossing each other?

<p>The electric field lines are not in the same region of space (B)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>N·C⁻¹ (B)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current (D)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule in determining the direction of the magnetic field?

<p>To determine the direction of the magnetic field lines (C)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a current-carrying loop of wire?

<p>Converging lines with a distinct north and south pole (D)</p> Signup and view all the answers

What is the symbol used to represent a magnetic field line emerging from the page?

<p>⊙ (C)</p> Signup and view all the answers

What is the effect of increasing the current in a wire on the strength of the magnetic field?

<p>The magnetic field strength increases (D)</p> Signup and view all the answers

What is the direction of the magnetic field lines inside a solenoid?

<p>Uniform and strong (C)</p> Signup and view all the answers

What is the formula for the electric field strength at a point?

<p>E = F/q (A)</p> Signup and view all the answers

What is the effect of decreasing the distance between the source charge and the point where the electric field strength is being calculated?

<p>The electric field strength increases (C)</p> Signup and view all the answers

What is the unit of Coulomb's constant?

<p>N·m²/C² (B)</p> Signup and view all the answers

What is the unit of power used to calculate the cost of electricity?

<p>Kilowatt-hours (A)</p> Signup and view all the answers

What is the formula to calculate the cost of running an electrical appliance?

<p>Cost = Power (kW) × Time (hours) × Cost per kWh (D)</p> Signup and view all the answers

Why is it important to convert time from minutes or seconds to hours for electricity consumption calculations?

<p>To make the units consistent with the power rating (A)</p> Signup and view all the answers

What is the benefit of understanding the principles of electrical power and energy?

<p>All of the above (D)</p> Signup and view all the answers

What is the purpose of determining the power rating of an electrical appliance?

<p>To determine the cost of running the appliance (A)</p> Signup and view all the answers

What is the unit of energy used to calculate the total energy consumption?

<p>Kilowatt-hours (D)</p> Signup and view all the answers

What is the formula for calculating power in an electrical circuit?

<p>$P = I \cdot V$ (A)</p> Signup and view all the answers

What is the unit of measurement for power?

<p>Watt (A)</p> Signup and view all the answers

What is the formula for calculating electrical energy?

<p>$E = P \cdot t$ (D)</p> Signup and view all the answers

What is the purpose of batteries in a circuit?

<p>To convert chemical potential energy into electrical energy (B)</p> Signup and view all the answers

What is the relationship between power and voltage in an electrical circuit?

<p>Power is directly proportional to the voltage (A)</p> Signup and view all the answers

What is the formula for the total resistance in a parallel circuit?

<p>$1/R_p = 1/R_1 + 1/R_2 + 1/R_3 + \ldots + 1/R_n$ (A)</p> Signup and view all the answers

What is the unit of electrical energy often used in household and commercial contexts?

<p>Kilowatt-hour (B)</p> Signup and view all the answers

What is the relationship between power and current in an electrical circuit?

<p>Power is directly proportional to the square of the current (B)</p> Signup and view all the answers

What is the purpose of combining series and parallel circuits?

<p>To calculate the total resistance in stages (B)</p> Signup and view all the answers

What is the definition of power in an electrical circuit?

<p>The rate at which work is done (A)</p> Signup and view all the answers

What is the resultant force on an object when multiple forces are acting on it?

<p>The vector sum of all the forces acting on the object (A)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify complex problems involving inclined planes (B)</p> Signup and view all the answers

What is the coefficient of friction dependent on?

<p>The nature of the surfaces in contact (C)</p> Signup and view all the answers

What is the normal force on an object placed on a horizontal surface?

<p>Perpendicular to the surface (D)</p> Signup and view all the answers

What is the formula for calculating the kinetic frictional force?

<p>f_k = μ_k N (B)</p> Signup and view all the answers

What is Newton's Second Law of Motion?

<p>If a resultant force acts on a body, it will cause the body to accelerate in the direction of the resultant force (C)</p> Signup and view all the answers

What is the purpose of drawing a free-body diagram?

<p>To represent the forces acting on an object (B)</p> Signup and view all the answers

What is the formula for calculating the maximum static frictional force?

<p>f_s = μ_s N (C)</p> Signup and view all the answers

What is the direction of the normal force on an object placed on an inclined plane?

<p>Perpendicular to the inclined plane (A)</p> Signup and view all the answers

What is the condition for an object to be in equilibrium?

<p>The net force acting on the object is zero (A)</p> Signup and view all the answers

What is the primary reason for using the Cartesian plane to represent two-dimensional vectors?

<p>To provide a coordinate system for graphing vectors (D)</p> Signup and view all the answers

When two vectors are perpendicular, what is the angle between them?

<p>90 degrees (D)</p> Signup and view all the answers

What is the significance of specifying vector direction in two-dimensional vector representation?

<p>It is essential for accurate representation and calculation (C)</p> Signup and view all the answers

What is the result of adding vectors in two dimensions using the graphical method?

<p>A vector with a magnitude and direction that represents the combined effect (C)</p> Signup and view all the answers

How are vectors typically represented on the Cartesian plane?

<p>With their tails anywhere on the plane and their heads at the origin (C)</p> Signup and view all the answers

What is the significance of the Positive x-axis in specifying vector direction?

<p>It is the reference point for measuring vector direction (B)</p> Signup and view all the answers

What is the result of resolving a vector into its components?

<p>Two vectors that are perpendicular to each other and have magnitudes that add up to the original vector (D)</p> Signup and view all the answers

What is the advantage of using the algebraic method over the graphical method for adding vectors?

<p>It is more efficient (D)</p> Signup and view all the answers

What is the correct way to calculate the resultant force acting on an object?

<p>Resolve all forces into components parallel to the x- and y-directions, and then use vector addition to find the resultant force. (B)</p> Signup and view all the answers

What is the relationship between the normal force and the gravitational force when an object is placed on a surface?

<p>The normal force is perpendicular to the gravitational force. (D)</p> Signup and view all the answers

What is the coefficient of friction dependent on?

<p>The nature of the surfaces in contact and the magnitude of the normal force. (A)</p> Signup and view all the answers

What is the purpose of drawing a force diagram?

<p>To sketch all the forces acting on a system, represented by arrows. (A)</p> Signup and view all the answers

What is the mathematical representation of Newton's Second Law of Motion?

<p>F = ma (D)</p> Signup and view all the answers

What is the direction of the frictional force when an object is moving on a surface?

<p>Opposite to the direction of motion. (D)</p> Signup and view all the answers

What is the condition for an object to be in equilibrium?

<p>The resultant force acting on the object is zero. (D)</p> Signup and view all the answers

What is the primary force acting on an object as it accelerates down an inclined plane?

<p>Component of gravitational force parallel to the slope (A)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify calculations involving inclined planes. (A)</p> Signup and view all the answers

What is the formula for the maximum static frictional force?

<p>f_s = μ_sN (A)</p> Signup and view all the answers

What is the direction of the net force acting on an object in a state of uniform motion?

<p>Zero or equal to zero (A)</p> Signup and view all the answers

What is the relationship between the coefficient of static friction and the coefficient of kinetic friction?

<p>The coefficient of static friction is always greater than the coefficient of kinetic friction (C)</p> Signup and view all the answers

What is the definition of inertia?

<p>The property of an object to continue in its current state of motion unless acted upon by a net force. (D)</p> Signup and view all the answers

What is the purpose of drawing a free-body diagram?

<p>To visualize and identify all the forces acting on an object (D)</p> Signup and view all the answers

What is the effect of an increase in acceleration on the apparent weight of an object in a lift?

<p>It increases the apparent weight (A)</p> Signup and view all the answers

What is the direction of the force of gravity between two objects?

<p>Along the line connecting the two objects (C)</p> Signup and view all the answers

What is the primary difference between static friction and kinetic friction?

<p>Static friction acts on stationary objects, while kinetic friction acts on moving objects (B)</p> Signup and view all the answers

What is the purpose of resolving forces into components?

<p>To simplify the calculation of forces acting on an object in a two-dimensional plane (C)</p> Signup and view all the answers

What is the condition for an object to be in equilibrium?

<p>The sum of the forces acting on it and the resultant force are both equal to zero (C)</p> Signup and view all the answers

What is the definition of Newton's Third Law of Motion?

<p>For every action, there is an equal and opposite reaction (C)</p> Signup and view all the answers

What is the condition for a closed vector diagram?

<p>The resultant vector has zero magnitude (C)</p> Signup and view all the answers

What is the advantage of using components to find the resultant vector?

<p>It simplifies the calculation of the resultant vector's magnitude (D)</p> Signup and view all the answers

What is the formula to find the magnitude of the resultant vector for perpendicular vectors?

<p>R = √(Rx^2 + Ry^2) (D)</p> Signup and view all the answers

What is the significance of the angle θ in resolving vectors into components?

<p>It is measured counter-clockwise from the positive x-axis (B)</p> Signup and view all the answers

What is the purpose of the tail-to-head method for adding vectors?

<p>To add vectors in a graphical method (D)</p> Signup and view all the answers

What is the unit of force in the International System of Units (SI)?

<p>Newton (B)</p> Signup and view all the answers

What is the definition of a force?

<p>A push or pull that can cause a change to objects (D)</p> Signup and view all the answers

What is the difference between a contact force and a non-contact force?

<p>A contact force must touch or be in contact with an object, while a non-contact force does not (A)</p> Signup and view all the answers

What is the formula to find the horizontal component of a vector?

<p>Rx = R cos(θ) (A)</p> Signup and view all the answers

What is the result of resolving a vector into its components?

<p>Two perpendicular vectors that sum to the original vector (D)</p> Signup and view all the answers

What is the primary difference between mass and weight?

<p>Mass is constant, whereas weight depends on the gravitational force (C)</p> Signup and view all the answers

Which of the following is NOT a characteristic of gravitational force?

<p>It is a force that depends on the velocity of the objects (B)</p> Signup and view all the answers

What happens to the gravitational force between two objects when the distance between them is halved?

<p>It increases by a factor of 4 (C)</p> Signup and view all the answers

Which of the following is a characteristic of both gravitational force and electrostatic force?

<p>They are both inversely proportional to the distance between the objects (D)</p> Signup and view all the answers

What is the value of the gravitational constant G?

<p>6.67 × 10^-11 N·m²·kg⁻² (A)</p> Signup and view all the answers

What is the direction of the gravitational force between two objects?

<p>It acts along the line connecting the centers of the two masses (D)</p> Signup and view all the answers

What is the difference between gravitational acceleration and gravitational force?

<p>Gravitational acceleration is the acceleration of an object due to gravity, while gravitational force is the force of gravity on an object (A)</p> Signup and view all the answers

What is the relationship between the magnitude of the charges and the electrostatic force between them?

<p>The electrostatic force is directly proportional to the magnitude of the charges (D)</p> Signup and view all the answers

What is the significance of Coulomb's law?

<p>It describes the electrostatic force between two point-like charges (C)</p> Signup and view all the answers

What happens to the electrostatic force between two charges when the distance between them increases?

<p>It decreases by a factor of 4 (A)</p> Signup and view all the answers

What is the primary reason why the electrostatic force and gravitational force exhibit similar mathematical forms?

<p>Both forces exhibit an inverse-square relationship with distance (B)</p> Signup and view all the answers

What happens to the electrostatic force between two charges if the distance between them is halved?

<p>The force increases by a factor of 4 (C)</p> Signup and view all the answers

What is the significance of the value of the electrostatic constant in free space?

<p>It is a fundamental constant that describes the electrostatic force between two charges (A)</p> Signup and view all the answers

What is the primary difference between Coulomb's law and Newton's universal law of gravitation?

<p>Coulomb's law describes the force between two charges, while Newton's law describes the force between two masses (D)</p> Signup and view all the answers

What is the relationship between the magnitude of the charges and the distance between them in Coulomb's law?

<p>The force is directly proportional to the magnitude of the charges and inversely proportional to the distance between them (B)</p> Signup and view all the answers

What is the purpose of the concept of an electric field?

<p>To explain how charges influence each other across space (C)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in Coulomb's law and Newton's universal law of gravitation?

<p>It highlights the rapid decrease in force with increasing separation between particles (B)</p> Signup and view all the answers

What is the mathematical representation of Coulomb's law?

<p>F = k(Q1 * Q2)/r^2 (D)</p> Signup and view all the answers

What is the common feature of Coulomb's law and Newton's universal law of gravitation?

<p>Both laws describe forces that exhibit an inverse-square relationship with distance (A)</p> Signup and view all the answers

What is the physical quantity represented by the symbol Q in Coulomb's law?

<p>Magnitude of a charge (A)</p> Signup and view all the answers

What is the direction of the electric field at a point in space where a positive test charge is placed?

<p>In the same direction as the force experienced by the test charge (C)</p> Signup and view all the answers

What happens to the force experienced by a positive test charge as it moves further away from a positive charge?

<p>The force decreases with distance (C)</p> Signup and view all the answers

What is the significance of the density of electric field lines around a charge?

<p>It indicates the strength of the electric field (D)</p> Signup and view all the answers

What is the direction of the electric field lines around a negative charge?

<p>Towards the negative charge (C)</p> Signup and view all the answers

What happens to the electric field lines around two positive charges of equal magnitude placed next to each other?

<p>The electric field lines cancel out in the region between the charges (A)</p> Signup and view all the answers

What is the purpose of drawing electric field lines?

<p>To represent the direction of the electric field (B)</p> Signup and view all the answers

What is the significance of the arrowheads on electric field lines?

<p>They indicate the direction of the electric field (A)</p> Signup and view all the answers

What happens to the electric field lines around a charge when the magnitude of the charge increases?

<p>The electric field lines become stronger (D)</p> Signup and view all the answers

What is the direction of the electric field lines around two unlike charges placed next to each other?

<p>From the positive charge to the negative charge (A)</p> Signup and view all the answers

What is the significance of the spacing between electric field lines around a charge?

<p>It indicates the strength of the electric field (D)</p> Signup and view all the answers

What is the unit of measurement for the energy consumption of an electrical appliance?

<p>Kilowatt-hours (kWh) (A)</p> Signup and view all the answers

If an electrical appliance has a power rating of 2 kW and is used for 3 hours, what is the total energy consumption?

<p>6 kWh (D)</p> Signup and view all the answers

What is the purpose of calculating the cost of electricity consumption?

<p>To estimate the electricity bill based on usage patterns (C)</p> Signup and view all the answers

What is the correct formula to calculate the cost of running an appliance?

<p>Cost = Power (kW) × Time (hours) × Cost per kWh (D)</p> Signup and view all the answers

Why is understanding electrical power and energy important?

<p>To ensure efficient use of energy and manage electrical circuits effectively (B)</p> Signup and view all the answers

What is the conversion factor to convert power from watts to kilowatts?

<p>Divide by 1000 (C)</p> Signup and view all the answers

What is the primary difference between the magnetic field inside and outside a solenoid?

<p>The magnetic field outside a solenoid is weaker than inside. (D)</p> Signup and view all the answers

What is the purpose of installing markers on overhead power lines?

<p>To make the power lines more visible to birds. (B)</p> Signup and view all the answers

What is the direction of the induced emf in a loop when a south pole of a magnet approaches it?

<p>Opposing the south pole's magnetic field. (D)</p> Signup and view all the answers

What is the unit of magnetic flux?

<p>Weber (C)</p> Signup and view all the answers

What is the effect of varying the current through an electromagnet?

<p>The strength of the magnetic field can be controlled. (A)</p> Signup and view all the answers

What is the significance of the angle θ in calculating magnetic flux?

<p>It determines the component of the magnetic field perpendicular to the surface. (D)</p> Signup and view all the answers

What is the primary application of Faraday's Law of Electromagnetic Induction?

<p>Generating electricity in power plants. (B)</p> Signup and view all the answers

What is the effect of a stationary magnet on a wire?

<p>It does not induce any voltage or current in the wire. (A)</p> Signup and view all the answers

What is the relationship between the number of turns in a coil and the induced emf?

<p>The induced emf is directly proportional to the number of turns. (D)</p> Signup and view all the answers

What is the purpose of Lenz's Law?

<p>To determine the direction of the induced emf. (D)</p> Signup and view all the answers

What is the unit of electric field strength?

<p>Newton per coulomb (B)</p> Signup and view all the answers

What is the direction of the magnetic field lines around a current-carrying wire?

<p>Perpendicular to the direction of the current (B)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a straight wire?

<p>Concentric circles (A)</p> Signup and view all the answers

What is the direction of the magnetic field lines inside a current-carrying loop of wire?

<p>Converging towards the center of the loop (B)</p> Signup and view all the answers

In a solenoid, what determines the direction of the induced current?

<p>The Right Hand Rule (D)</p> Signup and view all the answers

What is the relationship between the strength of the magnetic field and the distance from the source charge?

<p>The strength of the magnetic field decreases with the distance from the source charge (A)</p> Signup and view all the answers

What is the principle behind electromagnetic induction in devices like inductors?

<p>Self-induction (D)</p> Signup and view all the answers

What is the shape of the magnetic field lines around a solenoid?

<p>Uniform and strong, resembling a bar magnet (B)</p> Signup and view all the answers

What is the purpose of the Right Hand Rule in determining the direction of the magnetic field?

<p>To determine the direction of the magnetic field (D)</p> Signup and view all the answers

What is the relationship between voltage, current, and resistance in a circuit according to Ohm's Law?

<p>I = V/R (D)</p> Signup and view all the answers

What is the unit of Coulomb's constant?

<p>Newton-meter per coulomb squared (C)</p> Signup and view all the answers

What is the characteristic of ohmic conductors?

<p>Their resistance is constant at constant temperature (A)</p> Signup and view all the answers

What is the formula for the total resistance in a series circuit?

<p>Rs = R1 + R2 + R3 + ... + Rn (A)</p> Signup and view all the answers

What is the relationship between the strength of the electric field and the distance from the source charge?

<p>The strength of the electric field decreases with the distance from the source charge (D)</p> Signup and view all the answers

What is the formula for the electric field strength?

<p>E = F/q (A), E = kQ/r (B)</p> Signup and view all the answers

What is the purpose of Lenz's Law?

<p>To ensure the direction of the induced emf always opposes the change in magnetic flux (A)</p> Signup and view all the answers

What is the characteristic of non-ohmic conductors?

<p>Their resistance changes with temperature (C)</p> Signup and view all the answers

What is the advantage of using Ohm's Law in circuit analysis?

<p>It simplifies the analysis of complex circuits by providing a linear relationship between voltage, current, and resistance (D)</p> Signup and view all the answers

What is the purpose of analyzing circuits with resistors in series or parallel?

<p>To simplify the analysis of complex circuits and determine the total resistance, voltage, and current (A)</p> Signup and view all the answers

What is the significance of the graph of current vs. voltage for ohmic conductors?

<p>It is a straight line (D)</p> Signup and view all the answers

What is the total resistance in a parallel circuit given by?

<p>$\frac{1}{R_p} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + … + \frac{1}{R_n}$ (A)</p> Signup and view all the answers

What is the relationship between the power and the voltage in an electrical circuit?

<p>Power is directly proportional to the voltage. (A)</p> Signup and view all the answers

What is the formula for calculating the total energy consumed by an electrical device?

<p>E = P × t (C)</p> Signup and view all the answers

What is the unit of measurement for power?

<p>Watt (D)</p> Signup and view all the answers

What is the relationship between the power and the current in an electrical circuit?

<p>Power is directly proportional to the square of the current. (D)</p> Signup and view all the answers

What is the purpose of combining series and parallel circuits?

<p>To analyze circuits with complex setups. (D)</p> Signup and view all the answers

What is the formula for calculating power in an electrical circuit?

<p>P = I × V (D)</p> Signup and view all the answers

What is the equivalent expression for power when the current and resistance are known?

<p>P = I^2 × R (B)</p> Signup and view all the answers

What is the purpose of calculating the total energy consumed by an electrical device?

<p>To determine the cost of operating the device. (A)</p> Signup and view all the answers

What is the unit of measurement for electrical energy in practical applications?

<p>Kilowatt-hour (C)</p> Signup and view all the answers

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