Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Electricity
249 practice questions
Topics covered
Practice questions
211–220 of 249
Question 211
4 marks · Normal
Answer and see the solution →A conveyor belt moves grains past a metal plate. The grains rub the belt and become charged.
(a)[2 marks]Describe what happens if the grains are negatively charged and the metal plate is earthed.
(b)[2 marks]Explain how static electricity can be used to separate the grains from unwanted materials (chaff) using a charged conveyor and earthed plate.
Question 212
1 mark · Easy
Answer and see the solution →State one reason why static electricity can be dangerous when refuelling vehicles.
Question 213
2 marks · Easy
Answer and see the solution →Describe what happens to charged dust particles as they pass through an electrostatic precipitator.
Question 214
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 215
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 216
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 217
1 mark · Easy
Answer and see the solution →State one safety measure used in factories to reduce the dangers of static electricity.
Question 218
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.
Question 219
2 marks · Easy
Answer and see the solution →Explain why walking across a carpet and then touching a metal door handle can cause you to feel a small shock.
(a)[1 mark]What happens to your body as you walk across the carpet?
(b)[1 mark]Why do you feel a shock when you touch the metal handle?
Question 220
2 marks · Normal
Answer and see the solution →Explain why fuel tankers must be earthed before transferring fuel.