Electricity Concepts: Current, Voltage, and Resistance
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Questions and Answers

What is the force pushing electrons through a wire likened to in the text?

  • Electrons in a wire
  • Friction against the walls
  • Water flowing through a hose (correct)
  • Resistance slowing down the flow

    • Which of the following materials is NOT a good electrical conductor according to the text?

  • Silver
  • Gold
  • Air (correct)
  • Copper

    • Which scientific principle describes the flow of electrons from atom to atom in a conductor?

  • Resistance principle
  • Conductivity principle (correct)
  • Voltage principle
  • Ohm's law principle

    • What type of current flows in only one direction from negative toward positive pole of the source?

    <p>Direct Current (DC)</p> Signup and view all the answers

    In the context of electricity, which types of elements are good conductors?

    <p>Elements with fewer than four electrons in their outer shell</p> Signup and view all the answers

    What happens in a circuit with an open circuit?

    <p>No current flows</p> Signup and view all the answers

    In a closed circuit, what happens when the switch is closed?

    <p>Current flows</p> Signup and view all the answers

    What is the direction of electron flow in a conductor according to the Electron Theory?

    <p>From negative to positive</p> Signup and view all the answers

    Which term is used in the text to describe an impediment that slows the flow of electrons?

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

    Why does a short circuit have too much current flowing through it?

    <p>Low resistance in the short circuit</p> Signup and view all the answers

    Which of the following electrical quantities is measured in Ohms?

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

    Which of the following is NOT considered a good insulator according to the text?

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

    What does the term 'insulator' refer to in the context of electricity?

    <p>A material that inhibits the flow of electrons</p> Signup and view all the answers

    What term is used to describe materials that do not let electricity flow through them?

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

    What is the role of a fuse in a circuit with a short circuit?

    <p>To protect the circuit by burning up if a maximum current is exceeded</p> Signup and view all the answers

    Which electrical quantity is directly related to the rate of energy consumption in a circuit?

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

    How does less resistance in a short circuit affect current flow?

    <p>Increases current flow</p> Signup and view all the answers

    What happens to power wires during a short circuit?

    <p>They have very little resistance</p> Signup and view all the answers

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