Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Waves
356 practice questions
Topics covered
Practice questions
71–80 of 181 · Normal
Question 71
3 marks · Normal
Answer and see the solution →Describe what happens to the wavelength of water waves in a ripple tank if the frequency of the waves is increased while the wave speed remains the same.
Question 72
4 marks · Normal
Answer and see the solution →A student investigates water waves using a ripple tank. The student measures that 12 complete waves pass a point in 6.0 s. The wavelength of each wave is 25 cm.
(a)[2 marks]Calculate the frequency of the waves.
(b)[2 marks]Calculate the speed of the waves. Give your answer in m/s.
Question 73
3 marks · Normal
Answer and see the solution →In a laboratory experiment, a student uses a ripple tank to measure the wavelength and speed of water waves. Describe a method the student could use to measure the frequency of the waves.
Question 74
2 marks · Normal
Answer and see the solution →The table shows properties of three waves traveling with the same speed.
Wave properties Wave Frequency (Hz) Wavelength (m) A 10 2.0 B 4 5.0 C 20 1.0 (a)[2 marks]Which two waves have the same wave speed? Give your answer using wave letters.
Question 75
1 mark · Normal
Answer and check →Which change below would double the wave speed if the frequency of a wave stays the same?
- A.Double the wavelength.
- B.Halve the wavelength.
- C.Double the frequency.
- D.Halve the frequency.
Question 76
4 marks · Normal
Answer and see the solution →A student is investigating waves in a rope by creating pulses at one end and measuring their properties.
(a)[1 mark]State the equation that links wave speed, frequency, and wavelength.
(b)[2 marks]The wave in the rope has a frequency of 5 Hz and a wavelength of 0.8 m. Calculate the speed of the wave.
(c)[1 mark]State the unit of frequency.
Question 77
3 marks · Normal
Answer and see the solution →A musical instrument generates a sound wave with a speed of 340 m/s and a wavelength of 0.85 m.
Calculate the frequency of the sound produced by the instrument.
Question 78
3 marks · Normal
Answer and see the solution →A ripple tank is set up to demonstrate that increasing the frequency of waves changes the observed pattern.
Describe what happens to the wavelength of the water waves when the frequency is increased, and explain your answer using the wave equation.
Question 79
1 mark · Normal
Answer and check →Which of the following best describes 'wavelength'?
- A.The number of waves produced per second.
- B.The distance between one crest and the next.
- C.The number of crests passing a point each second.
- D.The height of the wave from crest to trough.
Question 80
2 marks · Normal
Answer and see the solution →A student uses a ripple tank and counts 30 wave crests passing a fixed point in 10 seconds. What is the frequency of the waves?