Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Waves
356 practice questions
Topics covered
Practice questions
71–80 of 172 · Easy
Question 71
3 marks · Easy
Answer and see the solution →A radio wave travels at 3.0 × 10 m/s. The wavelength is 1500 m.
(a)[2 marks]Calculate the frequency of the radio wave.
(b)[1 mark]State whether this wave is an example of an electromagnetic or a sound wave.
Question 72
1 mark · Easy
Answer and check →Which of the following pairs could describe a wave with a speed of 16 m/s?
- A.frequency = 4 Hz, wavelength = 4 m
- B.frequency = 2 Hz, wavelength = 8 m
- C.frequency = 8 Hz, wavelength = 4 m
- D.frequency = 2 Hz, wavelength = 4 m
Question 73
1 mark · Easy
Answer and see the solution →State the SI unit for frequency.
Question 74
1 mark · Easy
Answer and see the solution →State the equation that links wave speed, frequency, and wavelength.
Question 75
2 marks · Easy
Answer and see the solution →A light wave travels at a speed of m/s and has a frequency of Hz. Calculate the wavelength of the light wave.
Question 76
2 marks · Easy
Answer and see the solution →In a ripple tank experiment, the frequency of the waves is increased while the speed of the waves remains the same. Explain what happens to the wavelength of the waves.
Question 77
1 mark · Easy
Answer and check →Which of the following will increase if the frequency of a wave increases but its speed stays constant?
- A.The time for one wave to pass
- B.The wavelength
- C.The energy carried per wave
- D.The number of waves passing per second
Question 78
3 marks · Easy
Answer and see the solution →A boat produces waves in a harbour. Each wave crest is 7 metres apart and 4 waves pass a fixed point every 14 seconds.
(a)[1 mark]Calculate the frequency of the waves.
(b)[2 marks]Calculate the speed of the waves.
Question 79
1 mark · Easy
Answer and see the solution →What term is used for the distance from one wave crest to the next?
Question 80
2 marks · Easy
Answer and see the solution →A science teacher says, “If you halve the frequency of a wave and keep its speed the same, you double the wavelength.” Explain why this is correct.