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Electrical conductors - Quiz

1.

A material that lets electricity pass through it is called ...

2.

A material that does NOT let electricity pass through it is called ...

3.

Which of the following materials is an electrical conductor?

4.

Which of the following materials is an electrical insulator?

5.

In which circuit will the bulb or bulbs glow brightest?

6.

Why is a bulb brighter when it is powered by two batteries rather than one?

7.

Ruby has connected two bulbs across two batteries in a simple circuit. How can she make the bulbs dimmer?

8.

Ruby makes a complete simple circuit with one bulb and three batteries. The bulb lights for an instant and then goes out. Why?

9.

Why is electrical wiring usually made from copper?

10.

Why is electrical wiring usually covered with a layer of plastic?

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