Gr 11 Physical Sciences: Ch 7 Sum Electrostatics
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Questions and Answers

What is the mathematical relationship between electrostatic force, charge, and distance?

  • $F = k \frac{Q_1 Q_2}{r}$
  • $F = k \frac{Q_1 Q_2}{r^4}$
  • $F = k \frac{Q_1 Q_2}{r^3}$
  • $F = k \frac{Q_1 Q_2}{r^2}$ (correct)

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

  • N·m^3/C^3
  • N·m^2/C^2 (correct)
  • N·m/C
  • N·m^4/C^4

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

  • It decreases by a factor of two
  • It increases by a factor of four
  • It increases by a factor of two
  • It decreases by a factor of four (correct)

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

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

What is the direction of the electric field at any point?

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

What is an electric field?

<p>A region of space where charges do interact (D)</p> Signup and view all the answers

How does the electrostatic force change when the magnitudes of the charges are increased?

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

What is the relationship between electric field and force?

<p>The electric field is the region where a charge experiences a force (B)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in physics?

<p>It shows that forces decrease rapidly with increasing separation (D)</p> Signup and view all the answers

What is the purpose of Coulomb's law?

<p>To describe the electrostatic force between charges (C)</p> Signup and view all the answers

What is the direction of the electrostatic force between two like charges?

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

What happens to the electrostatic force between two charges when the magnitude of the charges increases?

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

What is the proportionality constant in Coulomb's law?

<p>k - electrostatic constant (A)</p> Signup and view all the answers

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

<p>Inversely proportional to the square (A)</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 similarity between Coulomb's law and Newton's universal law of gravitation?

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

What is the direction of the electrostatic force between two unlike charges?

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

Who first studied the electrostatic force between charges in detail?

<p>Charles-Augustin de Coulomb (A)</p> Signup and view all the answers

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

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

What is the purpose of electric field lines?

<p>To show the force experienced by a test charge at various points. (D)</p> Signup and view all the answers

What is the force experienced by a positive test charge around a positive source charge?

<p>Repulsive force. (A)</p> Signup and view all the answers

What is the direction of the force vectors around a negative charge?

<p>Pointing towards the negative charge. (C)</p> Signup and view all the answers

What is the convention for drawing electric field lines around a positive charge?

<p>Arrows on the field lines point away from the positive charge. (D)</p> Signup and view all the answers

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

<p>They start from the positive charge and end at the negative charge. (B)</p> Signup and view all the answers

What is the result of placing a positive test charge exactly in the middle of two positive charges of equal magnitude?

<p>It experiences no net force. (A)</p> Signup and view all the answers

What is the effect of having charges of different magnitudes on the electric field lines?

<p>The field lines are more densely packed around the stronger charge. (D)</p> Signup and view all the answers

What is the definition of the strength of the electric field at a point?

<p>The force per unit charge that a test charge would experience at that point. (B)</p> Signup and view all the answers

What is the direction of the electric field lines around two negative charges?

<p>They point towards both charges. (B)</p> Signup and view all the answers

What is the effect of increasing the distance between two charges on the electrostatic force?

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

What is the significance of the inverse-square relationship in physics?

<p>It highlights the importance of distance in the interaction between particles (C)</p> Signup and view all the answers

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

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

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

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

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

<p>It is a vector quantity with direction equal to the force (B)</p> Signup and view all the answers

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

<p>Coulomb's law describes electrostatic forces, while Newton's law describes gravitational forces (B)</p> Signup and view all the answers

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

<p>It is a fundamental constant of nature, relating the electrostatic force to the product of the charges and distance (C)</p> Signup and view all the answers

What is the relationship between the electric field and the force experienced by a test charge?

<p>The electric field is proportional to the force (D)</p> Signup and view all the answers

What is the effect of increasing the magnitude of the charges on the electrostatic force?

<p>The force increases linearly (A)</p> Signup and view all the answers

What is the role of the test charge in defining the electric field?

<p>It is the detector of the electric field (B)</p> Signup and view all the answers

What is the effect of increasing the magnitude of the charges on the electrostatic force between them?

<p>The electrostatic force increases (A)</p> Signup and view all the answers

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

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

What is the significance of the square of the distance in Coulomb's law?

<p>It represents the inverse proportionality of the electrostatic force to the distance (C)</p> Signup and view all the answers

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

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

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

<p>It decreases by a factor of 9 (A)</p> Signup and view all the answers

What is the role 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 (B)</p> Signup and view all the answers

What is a characteristic of both the electrostatic force and the gravitational force?

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

What is the result of increasing the distance between the charges while keeping the magnitude of the charges constant?

<p>The electrostatic force decreases (D)</p> Signup and view all the answers

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

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

What is the convention for drawing electric field lines around a negative charge?

<p>Arrows point towards the 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 field lines repel from both charges (C)</p> Signup and view all the answers

What is the effect of having charges of different magnitudes on the electric field lines?

<p>The field lines are more densely packed around the stronger charge (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>The field lines start from the positive charge and end at the negative charge (C)</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 (C)</p> Signup and view all the answers

What happens to the force experienced by a positive test charge when it is placed exactly in the middle of two positive charges of equal magnitude?

<p>The force is cancelled out (C)</p> Signup and view all the answers

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

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

What is the purpose of electric field lines in representing electric fields?

<p>To show the direction of the force experienced by a test charge (A)</p> Signup and view all the answers

What is the relationship between the number of electric field lines and the strength of the electric field?

<p>The number of electric field lines is directly proportional to the strength of the electric field (D)</p> Signup and view all the answers

What is the inverse-square relationship in Coulomb's law describing?

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

What is the similarity between 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 (C)</p> Signup and view all the answers

What happens to the electrostatic force when the magnitude of the charges is increased?

<p>The force increases (A)</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 in the equation (D)</p> Signup and view all the answers

What is the role of a test charge in defining the electric field?

<p>To experience a force in the electric field (C)</p> Signup and view all the answers

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

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

What is the result of increasing the distance between two charges while keeping the magnitude of the charges constant?

<p>The electrostatic force decreases (D)</p> Signup and view all the answers

What is the significance of the inverse-square relationship in physics?

<p>It illustrates how forces rapidly decrease with increasing separation (B)</p> Signup and view all the answers

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

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

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

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

What is the effect of halving the distance between two point-like charges on the electrostatic force between them?

<p>The electrostatic force is quadrupled (C)</p> Signup and view all the answers

What is the physical significance of the inverse square relationship in Coulomb's law?

<p>It represents the decrease of the electrostatic force with increasing distance (D)</p> Signup and view all the answers

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

<p>The inverse square relationship (B)</p> Signup and view all the answers

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

<p>It is a proportionality constant (C)</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 (A)</p> Signup and view all the answers

What is the characteristic of the electrostatic force between two point-like charges?

<p>It is attractive between unlike charges and repulsive between like charges (D)</p> Signup and view all the answers

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

<p>He showed the inverse square relationship between the electrostatic force and distance (A)</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 characteristic of electric field lines around a positive charge?

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

What is the result of placing a positive test charge between two positive charges of equal magnitude?

<p>The test charge experiences no net force (B)</p> Signup and view all the answers

What is the effect of increasing the distance between two charges on the electric field?

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

What is the characteristic of electric field lines around two unlike charges?

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

What is the convention for drawing electric field lines around a negative charge?

<p>Arrows point towards the negative charge (B)</p> Signup and view all the answers

What is the effect of having charges of different magnitudes on the electric field lines?

<p>The electric field lines are denser around the stronger charge (B)</p> Signup and view all the answers

What is the definition of electric field strength?

<p>The force per unit charge that a test charge would experience at a point (C)</p> Signup and view all the answers

What is the characteristic of electric field lines around two like charges?

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

What is the relationship between the electric field and the force experienced by a test charge?

<p>The electric field is directly proportional to the force experienced by the test charge (A)</p> Signup and view all the answers

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

<p>One is attractive, while the other is repulsive (D)</p> Signup and view all the answers

Why is Coulomb's law similar to Newton's universal law of gravitation?

<p>Both laws describe the force between two point-like particles (D)</p> Signup and view all the answers

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

<p>It is a proportionality constant in Coulomb's law (B)</p> Signup and view all the answers

What is the role of the distance between the charges in Coulomb's law?

<p>It is inversely proportional to the square of the electrostatic force (A)</p> Signup and view all the answers

What is the effect of increasing the magnitude of the charges on the electrostatic force?

<p>The force increases (D)</p> Signup and view all the answers

What is the relationship between the electrostatic force and the electric field?

<p>The electrostatic force is proportional to the electric field (D)</p> Signup and view all the answers

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

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

What happens to the electrostatic force when the magnitude of the charges is doubled and the distance between them is halved?

<p>The force increases by a factor of 8 (D)</p> Signup and view all the answers

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

<p>To describe the rapid decrease in force with increasing separation (C)</p> Signup and view all the answers

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

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

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

<p>To explain the behavior of charged particles (A)</p> Signup and view all the answers

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

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

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

<p>It is a fundamental constant of nature (D)</p> Signup and view all the answers

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

<p>It is a vector quantity (C)</p> Signup and view all the answers

What is the role of the test charge in defining the electric field?

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

What is the effect of increasing the distance between two charges on the electrostatic force?

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

What is a characteristic of both the electrostatic force and the gravitational force?

<p>They both follow an inverse-square relationship (C)</p> Signup and view all the answers

What is the result of increasing the magnitude of the charges while keeping the distance between them constant?

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

What is the direction of the electric field at a point where the electric field lines are closest together?

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

What happens to a positive test charge placed exactly in the middle of two negative charges of equal magnitude?

<p>It experiences no net force (C)</p> Signup and view all the answers

What is the characteristic of the electric field around a single positive charge?

<p>The electric field lines are denser near the charge (C)</p> Signup and view all the answers

What is the result of placing a positive test charge near a negative charge?

<p>The test charge is attracted to the negative charge (A)</p> Signup and view all the answers

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

<p>Away from both charges (C)</p> Signup and view all the answers

What is the effect of increasing the distance between two charges on the electric field lines?

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

What is the relationship between the electric field strength and the distance from a point charge?

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

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

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

What is the characteristic of the electric field around a single negative charge?

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

What is the result of placing a positive test charge near a positive charge?

<p>The test charge is repelled by the positive charge (B)</p> Signup and view all the answers

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