# GCSE Questions: Static Electricity

Q8. Cordelia rubs a rubber balloon against the sleeve of her woollen jumper. The balloon becomes negatively charged.

(a)

(i) Complete the sentence using one of the following words:

 electrons neutrons protons

The balloon becomes negatively charged because it gains _ _ _ ? _ _ _ from the jumper.

[1 mark]

(ii) After charging the balloon, what is the overall charge left on her jumper?

[1 mark]

(b) The diagram shows two identically charged balloons hanging close together.

(i) Complete the following sentence.

[1 mark]

The balloons carry the same type of charge and so _ _ _ ? _ _ _ each other.

(ii) From the diagram, what can you conclude about the sizes of the forces acting on the balloons?

[1 mark]

(c) A lightning conductor attached to the outside of a building reduces the risk of damage being caused to the building by a lightning strike.

If the building is struck by lightning the electrical charge flows through the lightning conductor to earth.

(i) Through which one of the following materials can electrical charge flow easily?

 copper plastic rubber

[1 mark]

(ii) What happens to the temperature of a lightning conductor when electrical charge flows through it? Tick one box.

 the temperature decreases the temperature does not change the temperature increases

[1 mark]

(iii) During a lightning strike, 4.0 C of charge flow through a lightning conductor in 0.002 s.

Calculate the current that flows through the lightning conductor.

[3 marks]

[Total 9 marks]