Electricity
1. Name four things that would not work in your house if there was no
electricity.
2. Why is it better for some appliances to work from batteries?
3. Why must you not push things (other than plugs) into mains sockets?
4. Why should you not touch a mains switch or plug with wet hands?
5. Why do bathroom light switches often have a cord hanging from them?
6. Why do you need metal on the inside of a wire?
7. Why is there usually a plastic coating around a metal wire?
8. Why do people often wear rubber gloves and boots when using electrical
garden tools?
9. What happens when a circuit has a break (or gap) in it?
10. Should you connect both ends of a battery into a circuit? Why / why
not?
11. Name three electrical components used in simple circuits.
12. Imagine you have made a simple circuit using a battery, two wires and a
bulb. The bulb does not light up. Give three reasons to explain what
might be wrong.
13. What will happen if you try to complete a circuit by joining the glass of
a light bulb to the battery? Explain this.
14. Draw a circuit diagram showing a circuit with:
A battery, wires, an open switch and a bulb.
15. Draw a circuit diagram showing a circuit with:
Two batteries, wires, and open switch and a buzzer.
16. When do you get a short circuit?
17. How does a simple switch work?
18. Draw a circuit diagram to show how switches can be used to control two
different parts of a circuit.
19. If you add an extra battery to a circuit containing a bulb, how will this
affect the bulb?
20. What might happen to the bulb if you added too many extra batteries to
the circuit?
21. How would you make a bulb in a circuit shine with a fainter light? Suggest
two ways to do this.