Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Waves
356 practice questions
Topics covered
Practice questions
141–150 of 356
Question 141
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 142
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 143
4 marks · Normal
Answer and see the solution →A student uses a ripple tank to produce water waves. The motor is set so that the frequency of the waves is 5 Hz, and each wave has a wavelength of 0.18 m.
(a)[1 mark]State the equation linking wave speed, frequency, and wavelength.
(b)[2 marks]Calculate the speed of these water waves.
(c)[1 mark]Give the unit for wave speed.
Question 144
3 marks · Normal
Answer and see the solution →A sound wave has a time period of 0.005 s.
(a)[1 mark]State the relationship between frequency and time period.
(b)[2 marks]Calculate the frequency of the sound wave.
Question 145
3 marks · Normal
Answer and see the solution →A tuning fork produces sound waves in air with a frequency of 440 Hz. The speed of sound in air is 330 m/s. Calculate the wavelength of the sound waves.
Question 146
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 147
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 148
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 149
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 150
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.