Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Waves
356 practice questions
Topics covered
Practice questions
101–110 of 181 · Normal
Question 101
4 marks · Normal
Answer and see the solution →A car horn is sounding as the car approaches and then passes you while you stand at the roadside.
(a)[3 marks]Describe what happens to the pitch of the sound you hear as the car approaches, passes you, and moves away. Explain your answer using wave ideas.
(b)[1 mark]What is the name of this effect, and does it happen for all types of waves?
Question 102
4 marks · Normal
Answer and see the solution →The graph below shows the displacement of a point on a string as a wave passes along it.
Wave displacement versus time (a)[1 mark]What is the amplitude of the wave shown on the graph?
(b)[1 mark]Determine the time period of the wave.
(c)[2 marks]Calculate the frequency of the wave.
Question 103
1 mark · Normal
Answer and see the solution →State one use of gamma rays in medicine.
Question 104
2 marks · Normal
Answer and see the solution →Explain why gamma rays can both treat and cause cancer.
Question 105
3 marks · Normal
Answer and see the solution →Gamma rays can be harmful to medical staff working with them.
(a)[1 mark]State one precaution that medical staff should take when working with gamma rays.
(b)[2 marks]Explain why this precaution reduces the risk of harm.
Question 106
2 marks · Normal
Answer and see the solution →Copy and complete the table for gamma rays.
Possible harm and precautions for gamma rays Type of radiation Possible harm Precautions Gamma rays Question 107
1 mark · Normal
Answer and check →Which of the following is NOT a use of gamma rays?
- A.Treating cancer
- B.Sterilising food
- C.Taking photographs
- D.Sterilising surgical instruments
Question 108
3 marks · Normal
Answer and see the solution →Gamma rays are used to sterilise medical equipment.
(a)[2 marks]Explain why gamma rays are suitable for sterilising materials inside sealed packages.
(b)[1 mark]State one advantage of using gamma rays rather than boiling water for sterilising.
Question 109
2 marks · Normal
Answer and see the solution →Explain why food stays fresher for longer after it has been exposed to gamma radiation.
Question 110
3 marks · Normal
Answer and see the solution →Gamma rays are highly penetrating electromagnetic waves.
(a)[2 marks]Describe what happens if a person is exposed to a large dose of gamma rays.
(b)[1 mark]State one way to protect people from exposure to gamma rays in hospitals.