Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Electricity
249 practice questions
Topics covered
Practice questions
101–110 of 121 · Easy
Question 101
2 marks · Easy
Answer and see the solution →Describe why paint droplets in electrostatic spraying repel each other as they leave the spray gun.
Question 102
2 marks · Easy
Answer and see the solution →Explain why a bicycle frame is connected to an electrical supply during electrostatic paint spraying.
Question 103
2 marks · Easy
Answer and see the solution →(a)[1 mark]In electrostatic paint spraying, why is it useful for the paint to be attracted into ‘hard to reach’ corners and edges?
(b)[1 mark]How does electrostatic charge make this possible?
Question 104
1 mark · Easy
Answer and see the solution →State one reason why static electricity can be dangerous when refuelling vehicles.
Question 105
2 marks · Easy
Answer and see the solution →Describe what happens to charged dust particles as they pass through an electrostatic precipitator.
Question 106
1 mark · Easy
Answer and check →Which of the following is a problem that can arise due to static electricity in factories producing flour or grain?
- A.It can cause dust explosions.
- B.It increases the temperature of the flour.
- C.It makes the machinery run faster.
- D.It helps to remove moisture from the grain.
Question 107
3 marks · Easy
Answer and see the solution →The diagram shows smoke particles in a chimney. The smoke is passed through a mesh of highly charged wires and then through plates connected to earth.
Electrostatic precipitator setup (a)[1 mark]Explain why the dust particles gain a charge as they pass through the mesh.
(b)[2 marks]Explain why the charged dust particles are attracted to the earthed plate.
Question 108
2 marks · Easy
Answer and see the solution →Explain why it is important to avoid wearing rubber-soled shoes when working in environments with flammable gases.
Question 109
1 mark · Easy
Answer and see the solution →State one safety measure used in factories to reduce the dangers of static electricity.
Question 110
2 marks · Easy
Answer and see the solution →In a photocopier, explain why the toner powder sticks to some parts of the drum but not to others.