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Electrical conductors and insulators

3rd grade (Year 4 in England) · 16 questions · Common Core: NGSS.4-PS3-2 · England: KS2 Y4 Electricity

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  1. Question 1

    Which metal is most often used for electrical wires in homes?

    • A. copper
    • B. lead
    • C. iron
    • D. gold

  2. Question 2

    A graphite pencil lead is placed in the gap in this circuit and the switch is closed. Will the bulb light?

    1.5 Vgap
    • A. yes
    • B. no

  3. Question 3

    If you put a glass marble in the gap in a circuit, would it conduct electricity or insulate?

    • A. conductor
    • B. insulator

  4. Question 4

    Why should you not touch switches with wet hands?

    • A. Water with dissolved substances can conduct electricity
    • B. Water makes switches stick
    • C. Wet hands are insulators
    • D. Switches are made of water

  5. Question 5

    A gold ring is placed in the gap in this circuit and the switch is closed. Will the bulb light?

    1.5 Vgap
    • A. yes
    • B. no

  6. Question 6

    If you put a glass marble in the gap in a circuit, would it conduct electricity or insulate?

    • A. conductor
    • B. insulator

  7. Question 7

    Which is the best insulator to use for the handle of a screwdriver for electricians?

    • A. steel
    • B. aluminium (aluminum)
    • C. copper
    • D. hard rubber or plastic

  8. Question 8

    A graphite pencil lead is placed in the gap in this circuit and the switch is closed. Will the bulb light?

    1.5 Vgap
    • A. yes
    • B. no

  9. Question 9

    If you put a dry cotton thread in the gap in a circuit, would it conduct electricity or insulate?

    • A. conductor
    • B. insulator

  10. Question 10

    Which metal is most often used for electrical wires in homes?

    • A. gold
    • B. lead
    • C. copper
    • D. iron

  11. Question 11

    A paper clip covered in plastic is placed in the gap in this circuit and the switch is closed. Will the bulb light?

    1.5 Vgap
    • A. yes
    • B. no

  12. Question 12

    If you put a plastic ruler in the gap in a circuit, would it conduct electricity or insulate?

    • A. conductor
    • B. insulator

  13. Question 13

    Which metal is most often used for electrical wires in homes?

    • A. lead
    • B. iron
    • C. copper
    • D. gold

  14. Question 14

    A steel spoon is placed in the gap in this circuit and the switch is closed. Will the bulb light?

    1.5 Vgap
    • A. yes
    • B. no

  15. Question 15

    If you put a glass marble in the gap in a circuit, would it conduct electricity or insulate?

    • A. conductor
    • B. insulator

  16. Question 16

    Why are electrical wires covered in plastic?

    • A. To make the wire heavier
    • B. To make the electricity flow faster
    • C. Plastic conducts electricity better
    • D. Plastic is an insulator, so it keeps the current in the wire and keeps us safe

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  1. copper
  2. yes
  3. insulator
  4. Water with dissolved substances can conduct electricity
  5. yes
  6. insulator
  7. hard rubber or plastic
  8. yes
  9. insulator
  10. copper
  11. no
  12. insulator
  13. copper
  14. yes
  15. insulator
  16. Plastic is an insulator, so it keeps the current in the wire and keeps us safe