Module 1 D.C. Circuits Electricity Quiz
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Questions and Answers

What is the invisible energy that constitutes the flow of electrons in a closed circuit to do work?

  • Charged particles
  • Electricity (correct)
  • Neutrons
  • Protons

    • What happens to a body if some of its electrons are removed?

  • It attains a negative charge
  • It attains a positive charge (correct)
  • It remains neutral
  • It becomes a conductor

    • What are the valence electrons called when they are loosely attached to the nucleus of an atom and free to move when external energy is applied?

  • Protons
  • Neutrons
  • Ions
  • Free electrons (correct)

    • What is the practical unit of charge?

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

    What is the capacity of a charged body to do work called?

    <p>Electrical potential</p> Signup and view all the answers

    Which constituent part of matter contains charged particles like electrons and protons?

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

    What is the unit of electrical potential?

    <p>Joules/Coulomb</p> Signup and view all the answers

    How is electric current defined?

    <p>The rate of flow of electrons i.e. charge flowing per second</p> Signup and view all the answers

    What is the unit of current?

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

    What does Ohm's law state?

    <p>Current is directly proportional to the potential difference applied across the conductor</p> Signup and view all the answers

    What are the limitations of Ohm's law?

    <p>Not applicable for networks containing non-linear elements such as electric arc</p> Signup and view all the answers

    What is the difference between electromotive force (E.M.F) and potential difference?

    <p>E.M.F is the force that causes an electric current to flow, while potential difference is the energy used by one coulomb of charge in moving from one point to another</p> Signup and view all the answers

    What is the definition of electric potential?

    <p>A body is said to have an electric potential if 1 Joule of work is done to charge the body to 1 coulomb</p> Signup and view all the answers

    What happens when electrical potential is applied across a metallic wire?

    <p>Free electrons move towards the positive terminal of the cell</p> Signup and view all the answers

    What is the unit of electrical potential?

    <p>Volts or Joules/Coulomb</p> Signup and view all the answers

    Which statement about Ohm's law is true?

    <p>It does not apply to circuits with diodes or transistors</p> Signup and view all the answers

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