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Will the bulb light? Switches, gaps and complete circuits

4th grade (Year 5 in England) · 16 questions · Common Core: NGSS.4-PS3-2, NGSS.4-PS3-4 · England: KS2 Y4 Electricity

Name

Date

Score/ 16

  1. Question 1

    Look at the circuit. The switch is closed and one wire has come loose. Will the bulb light?

    1.5 V1.5 Vgap
    • A. yes, it lights
    • B. no, it stays off

  2. Question 2

    What does a switch do in a circuit?

    • A. It changes light into sound.
    • B. It makes the battery stronger.
    • C. It opens or closes a gap to stop or start the current.
    • D. It stores electricity.

  3. Question 3

    True or false? An open switch leaves a gap in the circuit.

    • A. True
    • B. False

  4. Question 4

    Look at the circuit. The switch is closed and one wire has come loose. Will the bulbs light?

    1.5 Vgap
    • A. yes, it lights
    • B. no, it stays off

  5. Question 5

    Why is a metal paperclip often used to make a simple homemade switch?

    • A. Metal is an insulator.
    • B. It looks nicer.
    • C. Paperclips store energy.
    • D. Metal is an electrical conductor, so it can complete the circuit.

  6. Question 6

    True or false? A plastic ruler can be used to close a circuit.

    • A. True
    • B. False

  7. Question 7

    Look at the circuit. The switch is closed. Will the bulbs light?

    1.5 V1.5 V
    • A. yes, it lights
    • B. no, it stays off

  8. Question 8

    A bulb in a complete circuit does not light. Which is the most likely fault?

    • A. The bulb has blown or the battery is flat.
    • B. The wires are too colourful.
    • C. It is daytime.
    • D. The table is wooden.

  9. Question 9

    True or false? Metals are good electrical conductors.

    • A. True
    • B. False

  10. Question 10

    Look at the circuit. The switch is closed. Will the bulbs light?

    1.5 V
    • A. yes, it lights
    • B. no, it stays off

  11. Question 11

    Why is a metal paperclip often used to make a simple homemade switch?

    • A. It looks nicer.
    • B. Paperclips store energy.
    • C. Metal is an electrical conductor, so it can complete the circuit.
    • D. Metal is an insulator.

  12. Question 12

    True or false? A plastic ruler can be used to close a circuit.

    • A. True
    • B. False

  13. Question 13

    Look at the circuit. The switch is open. Will the bulb light?

    1.5 V
    • A. yes, it lights
    • B. no, it stays off

  14. Question 14

    Why is a metal paperclip often used to make a simple homemade switch?

    • A. Metal is an electrical conductor, so it can complete the circuit.
    • B. It looks nicer.
    • C. Paperclips store energy.
    • D. Metal is an insulator.

  15. Question 15

    True or false? An open switch leaves a gap in the circuit.

    • A. True
    • B. False

  16. Question 16

    Look at the circuit. The switch is closed. Will the bulb light?

    1.5 V
    • A. yes, it lights
    • B. no, it stays off

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All done? Check your answers
  1. no, it stays off
  2. It opens or closes a gap to stop or start the current.
  3. True
  4. no, it stays off
  5. Metal is an electrical conductor, so it can complete the circuit.
  6. False
  7. yes, it lights
  8. The bulb has blown or the battery is flat.
  9. True
  10. yes, it lights
  11. Metal is an electrical conductor, so it can complete the circuit.
  12. False
  13. no, it stays off
  14. Metal is an electrical conductor, so it can complete the circuit.
  15. True
  16. yes, it lights