Physics Chapter on Current and Resistance

Two charged objects attract each other with a certain force. If the charges on both objects are doubled with no change in separation, what will happen to the force between them?

A current of 2 A flows through a conductor for 3 minutes. If the current is maintained for an additional 2 minutes, what will happen to the total charge transferred during these 5 minutes?

If the conductor is replaced and the current is reduced to 2 A, but the time is increased to 30 minutes, which situation results in a greater total charge transferred?

When two charges exert forces simultaneously on a third charge, the total force acting on that charge is the vector sum of the forces that the two charges would exert individually. This principle is known as the _____.

A battery is connected to a resistor and a current of 0.5 A flows for 20 minutes. After 10 minutes, the current is increased to 1.0 A. What is the total charge transferred during these 20 minutes?

Two point charges, +4 μC and −6 μC are placed 8 m apart. A third charge, +2 μC is located 3 m away from q1 and 5 m away from q2​. What can be said about the direction of the net force on q3​?

If the current in a circuit is doubled while keeping the time constant, what will happen to the total charge transferred according to the equation Q= I × t?

What does the equation Q = I × t represent in terms of electric current?

A spherical surface of radius r = 5 m surrounds a point charge q = +2 μC. If the radius of the spherical surface is doubled to r = 10 m, how does the electric flux through the surface change?

A capacitor with a capacitance of 5 μF is charged to a voltage of 10 V, storing a charge of 50 µC. Suppose the capacitor is connected to a battery that maintains a constant voltage of 10 V, and a dielectric with a dielectric constant of 2 is inserted. What will happen to the charge, capacitance, and voltage across the plates?

Which of the following factors does not affect the strength of the electric field created by a point charge?

A capacitor with a capacitance of 10 µF is charged to 6 V, storing a charge of 60 µC. Suppose a dielectric with a dielectric constant of 4 is inserted while the capacitor is disconnected from the power supply. What will happen to the charge, capacitance, and voltage across the plates?

What is the relationship between electric flux and the enclosed charge?

How does the electric field change as you move further away from a point charge?

Two resistors, one with a resistance of 10 Ω and the other with a resistance of 20 Ω, are connected in series to a 30 V battery. What is the total current flowing through the circuit?

What is the relationship between electric potential and electric field?

Two resistors, one with a resistance of 10 Ω and the other with a resistance of 20 Ω, are connected in parallel to a 30 V battery. What is the total current flowing through the circuit?

When two resistors, one with a resistance of 10 Ω and the other with a resistance of 20 Ω, are connected in series to a 30 V battery, compared to the total current in the circuit when the resistors are connected in parallel to the same battery, the total current in the series circuit will be:

What happens when an object becomes charged by rubbing?

Which of the following best describes Kirchhoff's Current Law (KCL)?

Which of the following best describes charging by induction?

A wire has a resistance of 8 Ω. If the length of the wire is doubled while the cross-sectional area is halved, what will the new resistance be?

What is the key difference between charging by rubbing and charging by induction?

If the length of a wire is halved and its cross-sectional area is doubled, how will the resistance of the wire change according to the relationship R=ρ L/A?

What is the current flowing through a resistor with a resistance of 10 ohms and a voltage drop of 20 volts?

Two charges, +8.0 C and -6.0 C, attract each other with a force of 3.0 x 10^3 N in a vacuum. What is the distance between the charges?

Which of the following describes the relationship between current, voltage, and resistance in Ohmic materials, according to Ohm's Law?

Two small charged objects, q1 = +5 μC and q2 = -3 μC, are placed 4m apart on a straight line to create an electric field for a sensor located at a point 2m from q1 and 2m from q2. What is the net electric field experienced by the sensor at this point?

A current of 0.25A flows through a conductor for 2 hours, and the same current flows through another conductor for 5 hours. Which conductor experiences a greater total charge transfer?

A charge q0 = +1 μC is placed at the origin of a coordinate system. Two other charges, q1 = +2 μC and q2 = -3 μC are located at points (2 m, 0) and (0, 3 m), respectively. Which of the following is INCORRECT in determining the net force on q0 due to q1 and q2?

A current of 4 A flows through a conductor for 10 minutes. How much charge flows through the conductor?

A battery has a terminal voltage of 12V. How much energy is transferred when a charge of 5C moves from the negative terminal to the positive terminal of the battery?

If the distance from a point charge is doubled, what happens to the electric field strength?

Describe the direction of the electric field created by a positive point charge.

What happens to the capacitance, charge, and electric field when a dielectric material is inserted between the plates of a charged capacitor?

What is the nature of the electric field between two parallel plates connected to a battery?

Why are capacitors preferred for storing energy in camera flash units?

Which of the following correctly describes the electric potential at a point due to a positive point charge?

A capacitor with a capacitance of 10 µF is charged to a potential difference of 6 V. What is the charge stored on the capacitor?

Which of the following statements is true about the relationship between capacitance, charge, and voltage in a capacitor?

What is the relationship between electric potential and distance from a charge?

Which of these best explains why capacitors are important in signal processing applications?

What is the electric potential at a point halfway between two equal and opposite charges, +Q and -Q, separated by a distance?

How do capacitors contribute to the functioning of a filtering circuit in electronics?

Why are capacitors used in timing circuits, like those in oscillators or clocks?

If the distance between two charges is doubled, how does the electric potential energy of the system change?

Why are capacitors used in power supply circuits in electronic devices?

What happens to the electric potential energy of a system of two charges if the distance between them is halved?