Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Electricity
249 practice questions
Topics covered
Practice questions
201–210 of 249
Question 201
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 202
2 marks · Normal
Answer and see the solution →Inkjet printers use static electricity to control where drops of ink land on the paper. Explain how electrostatic forces help form the image on the paper.
Question 203
2 marks · Normal
Answer and see the solution →A plastic rod is charged and held near a thin stream of water from a tap. Describe what happens to the stream, and explain why this occurs.
Question 204
1 mark · Normal
Answer and check →Which process best describes how static electricity is used in inkjet printers?
- A.Charged ink drops are directed by electrostatic forces onto the paper.
- B.Ink is magnetised to stick to the paper.
- C.Electric current heats the ink drops.
- D.A laser is used to fix the ink onto the paper.
Question 205
4 marks · Normal
Answer and see the solution →A factory uses an electrostatic method to spray powder onto plastic objects.
(a)[1 mark]State what charge should be given to the powder and to the plastic objects to ensure the powder is attracted to the objects.
(b)[3 marks]Explain how electrostatic forces help the powder to coat all parts of the plastic objects, even on surfaces that are hard to reach.
Question 206
2 marks · Normal
Answer and see the solution →State and explain one reason why electrostatic spraying reduces waste compared to ordinary spraying.
Question 207
1 mark · Normal
Answer and check →Which statement best describes how static electricity helps electrostatic paint spraying?
- A.Paint droplets get a charge so they are attracted to the oppositely charged object.
- B.Paint is made magnetic to stick better.
- C.The object is heated to attract the paint.
- D.A fan spreads paint evenly on the surface.
Question 208
2 marks · Normal
Answer and see the solution →Explain why paint droplets from an electrostatic spray gun spread out from each other as they leave the nozzle.
Question 209
4 marks · Normal
Answer and see the solution →In a factory, car doors are painted using electrostatic spraying.
(a)[2 marks]Describe how charges are arranged in the spray gun and on the car door during the process.
(b)[2 marks]Explain, using physics ideas, how electrostatic spraying improves the efficiency of painting compared to uncharged methods.
Question 210
3 marks · Normal
Answer and see the solution →Describe, using ideas about static electricity, how static charges are used in photocopiers.