Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
Microwaves
16 practice questions
Practice questions
11–16 of 16
Question 11
3 marks · Normal
Answer and see the solution →A company is designing a new microwave oven. They want to ensure it is both efficient and safe.
(a)[2 marks]Explain how microwaves heat food inside an oven.
(b)[1 mark]Describe one design feature that makes a microwave oven safe for users.
Question 12
4 marks · Normal
Answer and see the solution →Microwaves are part of the electromagnetic spectrum and have a wide range of applications.
(a)[2 marks]Explain why microwaves are used to send signals to and from satellites, rather than radio waves.
(b)[2 marks]Describe one reason why microwave ovens cook food differently compared to conventional ovens.
Question 13
1 mark · Normal
Answer and see the solution →Which of the following is a detrimental effect of excessive exposure to microwaves in the home?
- A.Can cause burns to human tissue
- B.Causes electric shocks
- C.Can permanently magnetise metals
- D.Can damage bone structure
Question 14
3 marks · Normal
Answer and see the solution →A student is comparing different ways microwaves and radio waves are used in technology. Complete the table below by stating one key use for each wave, and one safety concern linked to each.
Wave Example of a use One safety concern Microwaves Radio waves Question 15
3 marks · Normal
Answer and see the solution →A person spends a long time standing close to a malfunctioning microwave oven that is leaking microwaves.
(a)[2 marks]State and explain one harmful effect this exposure could have on the person’s body.
(b)[1 mark]Suggest one way the design of a microwave oven helps to prevent this effect.
Question 16
2 marks · Normal
Answer and see the solution →A student claims that using mobile phones is completely safe since microwaves have less energy than other waves in the electromagnetic spectrum. Do you agree? Give one scientific reason for your answer.