Gr 10 Physical Sciences Ch 12: Conservation of charge
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Questions and Answers

What does the principle of conservation of charge state?

  • The total charge before and after an interaction is always different
  • Charge can be created or destroyed during physical processes
  • The net charge of an isolated system remains constant during any physical process (correct)
  • Charge is only transferred from one material to another

    • What is a characteristic of conductors?

  • Charge remains concentrated in one area
  • Electrons are bound tightly to the atoms
  • They are poor insulators
  • Electrons can move relatively freely (correct)

    • What happens to an excess charge placed on a conductor?

  • The charge is transferred to an insulator
  • The charge is destroyed
  • The charge remains concentrated where it was placed
  • The like charges repel each other and spread out uniformly over the surface (correct)

    • What is the main difference between conductors and insulators?

    <p>Conductors allow electrons to move freely, while insulators do not</p> Signup and view all the answers

    What is the role of the electrostatic force in determining the arrangement of charge on a conductor?

    <p>It repels like charges, causing them to spread out uniformly</p> Signup and view all the answers

    What is an example of an insulator?

    <p>Plastic</p> Signup and view all the answers

    What happens to an excess charge placed on an insulator?

    <p>The charge remains concentrated where it was placed</p> Signup and view all the answers

    What is the shape of a conductor that affects the arrangement of charge on its surface?

    <p>Sphere</p> Signup and view all the answers

    What happens to the charge on two identical conducting spheres when they come into contact?

    <p>The total charge remains the same, and is shared equally between the two spheres.</p> Signup and view all the answers

    What is the purpose of a lightning rod on a building?

    <p>To safely channel away excess charge and reduce the risk of a lightning strike.</p> Signup and view all the answers

    Why do sharp points on conductors cause charge to leak off?

    <p>Because the points have a high concentration of charge.</p> Signup and view all the answers

    What happens to the charge on an insulator when it is brought into contact with a conductor?

    <p>The charge remains on the insulator and does not move.</p> Signup and view all the answers

    Why do conductors with irregular shapes have a concentration of charge near the points?

    <p>Because the points have a high curvature, resulting in a concentration of charge.</p> Signup and view all the answers

    What is the effect of the distribution of charge on conductors in practical applications?

    <p>It allows for the collection of charge at sharp points, which can be utilized in applications like lightning rods.</p> Signup and view all the answers

    What is the fundamental principle behind the conservation of charge?

    <p>The net charge of an isolated system remains constant.</p> Signup and view all the answers

    Which material allows electrons to move relatively freely?

    <p>Metal</p> Signup and view all the answers

    What happens to excess charge on an insulator?

    <p>It remains concentrated where it was placed.</p> Signup and view all the answers

    Why do like charges repel each other on the surface of a conductor?

    <p>Due to the electrostatic force.</p> Signup and view all the answers

    What is the primary reason for the uniform distribution of charge on a spherical conductor?

    <p>The electrostatic force between like charges.</p> Signup and view all the answers

    Which of the following is an example of a conductor?

    <p>Human body</p> Signup and view all the answers

    What is the primary difference between the behavior of charge on conductors and insulators?

    <p>Conductors allow electrons to move freely, while insulators do not.</p> Signup and view all the answers

    What is the net result of the electrostatic force between like charges on the surface of a conductor?

    <p>The charges repel each other.</p> Signup and view all the answers

    What is the primary reason for the concentration of charge near the points of a conductor with an irregular shape?

    <p>The curvature of the object is greatest at the points.</p> Signup and view all the answers

    When two identical conducting spheres come into contact, what is the final charge on each sphere?

    <p>(Q_1 + Q_2)/2</p> Signup and view all the answers

    What is the primary purpose of a lightning rod on a building?

    <p>To channel away excess charge and reduce the risk of a lightning strike.</p> Signup and view all the answers

    Why do sharp points on conductors cause charge to leak off?

    <p>Because the concentration of charge at the points is high.</p> Signup and view all the answers

    What is a significant implication of charge distribution on conductors in practical applications?

    <p>The protection of buildings from lightning strikes.</p> Signup and view all the answers

    Why does the distribution of charge on conductors not occur in insulators?

    <p>Because charge cannot move freely in insulators.</p> Signup and view all the answers

    What is the underlying reason for the uniform distribution of charge on a spherical conductor?

    <p>The repulsive forces between like charges cause them to spread out uniformly over the surface.</p> Signup and view all the answers

    What happens to the net charge of an isolated system during a physical process?

    <p>It remains constant.</p> Signup and view all the answers

    Why do electrons in conductors move relatively freely?

    <p>Because they are weakly bound to the atoms.</p> Signup and view all the answers

    What is the primary reason for the concentration of charge near the points of a conductor with an irregular shape?

    <p>The points have a higher curvature, which increases the electric field.</p> Signup and view all the answers

    What is the implication of the principle of conservation of charge on the interaction between two charged objects?

    <p>The total charge before and after the interaction remains the same.</p> Signup and view all the answers

    What is the primary difference between the behavior of charge on conductors and insulators?

    <p>Conductors allow electrons to move freely, while insulators do not.</p> Signup and view all the answers

    What is the role of the electrostatic force in determining the arrangement of charge on a conductor?

    <p>It causes the charge to spread out uniformly over the surface.</p> Signup and view all the answers

    What is the behavior of excess charge on an insulator?

    <p>It remains concentrated at a single point.</p> Signup and view all the answers

    What is the primary reason for the concentration of charge near the points of a conductor with an irregular shape?

    <p>The curvature of the conductor is greatest at the points</p> Signup and view all the answers

    What happens to the charge on two identical conducting spheres when they are not in contact?

    <p>The charge on each sphere remains the same</p> Signup and view all the answers

    Why do buildings often have a lightning rod on the roof?

    <p>To reduce the risk of a lightning strike by safely channeling away excess charge</p> Signup and view all the answers

    What is the primary reason for the difference in the distribution of charge on conductors and insulators?

    <p>The ability of charge to move freely in the material</p> Signup and view all the answers

    What is the equation for the final charge on each sphere when two identical conducting spheres come into contact?

    <p>Q = (Q1 + Q2)/2</p> Signup and view all the answers

    Why do sharp points on conductors cause charge to leak off?

    <p>The concentration of charge is higher at the points</p> Signup and view all the answers

    What happens to the charge on a conductor when it is brought into contact with another identical conductor?

    <p>The total charge is shared equally between the two conductors.</p> Signup and view all the answers

    Why do buildings often have a lightning rod on the roof?

    <p>To safely channel away any excess charge that might accumulate, reducing the risk of a lightning strike.</p> Signup and view all the answers

    What is the significance of the concentration of charge near the points of a conductor with an irregular shape?

    <p>It allows charge to leak off the conductor, reducing the risk of a lightning strike.</p> Signup and view all the answers

    Why does the distribution of charge on conductors not occur in insulators?

    <p>Because charge cannot move freely in insulators.</p> Signup and view all the answers

    What is the equation for the final charge on each sphere when two identical conducting spheres come into contact?

    <p>Q = (Q1 + Q2) / 2</p> Signup and view all the answers

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