Physics Chapter 3: Properties of Electric Charges
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Questions and Answers

What type of electric charge is possessed by protons?

  • Opposite charge
  • Neutral charge
  • Positive charge (correct)
  • Negative charge

    • What did Benjamin Franklin name the two kinds of electric charges?

  • Left and right charges
  • Up and down charges
  • Positive and negative charges (correct)
  • Forward and backward charges

    • When a comb is run through hair on a dry day, what does it attract?

  • Feathers
  • Rubber bands
  • Bits of paper (correct)
  • Metal objects

    • What happens when materials are electrified or become electrically charged?

    <p>They attract or repel each other</p> Signup and view all the answers

    What is the consequence of rubbing an inflated balloon with wool?

    <p>It adheres to a wall</p> Signup and view all the answers

    What happens when a glass rod rubbed with silk is brought near a negatively charged rubber rod?

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

    What does the observation of two charged rubber rods (or two charged glass rods) repelling each other indicate?

    <p>The rubber and glass have the same type of charge</p> Signup and view all the answers

    What is an important aspect of electricity arising from experimental observations?

    <p>Electric charge is always conserved in an isolated system</p> Signup and view all the answers

    What happens when one object is rubbed against another?

    <p>Charge is transferred from one object to the other</p> Signup and view all the answers

    What are electrical conductors?

    <p>Materials in which some of the electrons are free electrons that can move relatively freely through the material</p> Signup and view all the answers

    What category do materials such as glass, rubber, and wood fall into?

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

    What happens when electrical insulators are charged by rubbing?

    <p>Only the area rubbed becomes charged, and the charged particles can move to other regions of the material</p> Signup and view all the answers

    What happens when good electrical conductors are charged in some small region?

    <p>The charge readily distributes itself over the entire surface of the material</p> Signup and view all the answers

    What process is used to charge a conductor by induction?

    <p>Bringing a charged object near it</p> Signup and view all the answers

    What are semiconductors?

    <p>Materials with electrical properties between insulators and conductors</p> Signup and view all the answers

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