Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Electricity
249 practice questions
Topics covered
Practice questions
221–230 of 249
Question 221
2 marks · Normal
Answer and see the solution →A worker is repairing computer equipment. Explain why the worker must avoid wearing clothes made entirely from synthetic materials.
Question 222
3 marks · Normal
Answer and see the solution →Describe two dangers of static electricity in everyday life and how each can be reduced or prevented.
Question 223
4 marks · Normal
Answer and see the solution →(a)[2 marks]Aircraft are always earthed after landing. Explain why this is necessary.
(b)[2 marks]Suggest and describe a method by which the aircraft can be safely earthed after landing.
Question 224
4 marks · Normal
Answer and see the solution →(a)[2 marks]Describe a possible experiment to show that static electricity can cause a spark.
(b)[2 marks]State a safety precaution you would take when performing this experiment.
Question 225
2 marks · Normal
Answer and see the solution →Some factories use metal pipes to transport flammable powders. Explain why these pipes must be earthed.
Question 226
1 mark · Normal
Answer and see the solution →Which one of these actions helps prevent fires during the transfer of petrol at petrol stations?
- A.Using plastic fuel hoses to avoid shocks
- B.Switching off the pump before filling
- C.Earthing the fuel tanker
- D.Wearing rubber gloves
Question 227
2 marks · Normal
Answer and see the solution →Explain why you might receive a small electric shock after getting out of a car on a dry day.
Question 228
4 marks · Easy
Answer and see the solution →A plastic ruler is rubbed with a woollen cloth. It is then held near small pieces of paper, which jump towards the ruler. Later, this ruler is used to paint-spray a metal lamp using electrostatic paint spraying.
(a)[2 marks]Explain why the plastic ruler becomes charged when rubbed with the woollen cloth.
(b)[1 mark]State what happens to the electrons during this process.
(c)[1 mark]Explain why the electrostatic paint is attracted to the metal lamp after being sprayed.
Question 229
4 marks · Easy
Answer and see the solution →A student uses a plastic rod and a small piece of paper in an investigation. After rubbing the rod, he observes the paper is attracted to the rod. In another experiment, the rod is brought close to another charged rod, and they repel each other.
(a)[1 mark]State one property that both the plastic rod and the paper must have for the first experiment to work.
(b)[2 marks]Describe how the small piece of paper is attracted to the charged rod, even though the paper is uncharged at first.
(c)[1 mark]Explain why the two rods repel each other in the second experiment.
Question 230
4 marks · Easy
Answer and see the solution →An inkjet printer uses electrostatics to direct charged ink droplets onto paper. At the same time, a student is warned not to touch computer parts directly because of static electricity.
(a)[2 marks]Describe how static electricity is used to control where ink lands in an inkjet printer.
(b)[1 mark]Explain one way static electricity could damage computer components.
(c)[1 mark]State one precaution workers can take to avoid damage due to static electricity when handling electronics.