Physics

9th -

10thgrade

Image

9B Electricity Dangers 18 questions

38
plays

18 questions

Show Answers
See Preview
  • 1. Multiple Choice
    10 seconds
    1 pt

    What is the function of a relay?

    to allow a current in one circuit to operate a switch in another circuit

    to prevent an electric shock by earthing a metal case

    to protect a circuit by melting if the current becomes too large

    to transform a d.c. voltage to a different value

  • 2. Multiple Choice
    30 seconds
    1 pt

    After some building work in a house, a bare (uninsulated) live wire is left protruding from a wall. What is the greatest hazard?

    a fire

    a fuse blows

    an electric shock

    no current flows

  • 3. Multiple Choice
    20 seconds
    1 pt
    Image

    The diagram shows a 10Ω resistor and a 20Ω resistor connected in a potential divider circuit.

    4.0V

    6.0V

    8.0V

    12.0V

  • Answer choices
    Tags
    Answer choices
    Tags

    Explore all questions with a free account

    Already have an account?