Electric Conductors and Insulators Quiz
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Questions and Answers

What is the definition of electrical conductivity?

  • The measure of the ability of a substance to allow the flow of an electric current (correct)
  • The measure of the brightness of a light bulb when connected to a substance
  • The measure of the resistance of a substance to electricity
  • The measure of the ability of water to glow with electricity
  • Which type of substances have high electrical conductivity?

  • Good conductors (correct)
  • Liquids
  • Insulators
  • Metals
  • Why is pure water a poor conductor of electricity?

  • It forms enough ions to conduct electricity
  • It is too dense
  • It lacks free moving charged particles (correct)
  • It contains ions
  • What makes tap water, rainwater, seawater, and water from a well conduct electricity?

    <p>Presence of ions from impurities</p> Signup and view all the answers

    What are charge carriers in liquids generally?

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

    Why does pure water not conduct electricity effectively?

    <p>It doesn't have impurities</p> Signup and view all the answers

    Which materials allow the movement of charged particles and are called good conductors of electricity?

    <p>Copper, iron, brass</p> Signup and view all the answers

    What are materials called that do not allow the movement of charged particles and are termed as poor or bad conductors of electricity?

    <p>Wood, plastic, paper</p> Signup and view all the answers

    Why are insulators like rubber and plastic used in electric cabins?

    <p>To insulate against electric current</p> Signup and view all the answers

    What is the purpose of using insulators in the handles of tools used for electrical equipment?

    <p>To prevent electric shock</p> Signup and view all the answers

    In an electric circuit setup with a battery, bulb, and wire, if the bulb does not glow, what are the possible reasons according to the text?

    <p>The battery is drained out</p> Signup and view all the answers

    In a working circuit setup with a battery, bulb, and wire, what does it indicate if the bulb starts glowing according to the text?

    <p>The circuit is complete and everything is working fine</p> Signup and view all the answers

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