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Class 4 · Science and Technology · Electricity
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Class 4 · Science and Technology · Cameroon

Electricity: 5 practice questions

Free practice on Electricity for Class 4, following the Cameroon primary school curriculum (English subsystem). Every answer is explained, so a parent who is not sure of the answer can still help.

How to do this — Electricity

Using electricity safely

Electrical devices should always be used with dry hands, following safety instructions. Never work with wires while wet, and never ignore loose connections.

  1. Use dry hands
  2. Follow safety instructions
  3. Report loose or damaged wires

If something goes wrong

If an electrical device sparks or smokes, switch it off and tell a grown-up immediately. Never pour water on it while it is still plugged in.

⚡ Electrical spark — a warning sign

  1. Which of these correctly describes how an electrical device should be used?

    1. With dry hands and following safety instructions
    2. With wet hands for convenience
    3. By pulling the cord roughly
    4. Without ever checking for damage
    Show the answer

    Answer: A. With dry hands and following safety instructions

  2. Which safety measure should be taken when installing electrical devices?

    1. Working with live wires while wet
    2. Switching off the power supply before installing
    3. Ignoring loose connections
    4. Using broken wires without repair
    Show the answer

    Answer: B. Switching off the power supply before installing

  3. Avoiding playing with electrical devices is important because:

    1. it is simply not fun
    2. electrical devices are always harmless
    3. it can cause a dangerous electric shock or fire
    4. there is no real risk involved
    Show the answer

    Answer: C. it can cause a dangerous electric shock or fire

  4. Which of these is an electrical device found in many homes?

    1. A wooden spoon
    2. A clay pot
    3. A straw broom
    4. An electric iron
    Show the answer

    Answer: D. An electric iron

  5. If an electrical device sparks or smokes, you should:

    1. switch it off and tell a grown-up immediately
    2. keep using it as normal
    3. pour water on it while it is plugged in
    4. ignore it and walk away
    Show the answer

    Answer: A. switch it off and tell a grown-up immediately

Answer key — Electricity

  1. A. With dry hands and following safety instructions
  2. B. Switching off the power supply before installing
  3. C. it can cause a dangerous electric shock or fire
  4. D. An electric iron
  5. A. switch it off and tell a grown-up immediately

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