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Doppler effect for sound waves: CAIE A‑Level Physics questions

Every CAIE A-Level Physics exam question on 7.3 Doppler effect for sound waves, June 2024 and the specimen papers, with its mark scheme and examiner’s report.

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266 questions

  1. Q2(a)

    June 2024 · Paper 5

    1 mark7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(a): A graph is plotted of 1 f on the y-axis against v on the x-axis. Determine expressions for the gradient and y-intercept. gradient = y-intercept = [1]

  2. Q2(b)

    June 2024 · Paper 5

    2 marks7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(b): Values of v1, v2 and f are given in Table 2.1. Table 2.1 1 v1 / m s–1 v2 / m s–1 v / m s–1 f / Hz f / 10–3 Hz–1 3.1 3.9 894.2 6.7 5.9 901.2 9.2 8.2 908.0 11.9 1

  3. Q2(c)(i)

    June 2024 · Paper 5

    2 marks7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(c)(i): Plot a graph of 1 f / 10–3 Hz–1 against v / m s–1. Include error bars for v. [2]

  4. Q2(c)(ii)

    June 2024 · Paper 5

    2 marks7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(c)(ii): Draw the straight line of best fit and a worst acceptable straight line on your graph. Label both lines. [2]

  5. Q2(c)(iii)

    June 2024 · Paper 5

    2 marks7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(c)(iii): Determine the gradient of the line of best fit. Include the absolute uncertainty in your answer. gradient = [2]

  6. Q2(c)(iv)

    June 2024 · Paper 5

    2 marks7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(c)(iv): Determine the y-intercept of the line of best fit. Include the absolute uncertainty in your answer. y-intercept = [2]

  7. Q2(d)(i)

    June 2024 · Paper 5

    2 marks7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(d)(i): Using your answers to (a), (c)(iii) and (c)(iv), determine the values of fs and k. Include appropriate units. fs = k = [2]

  8. Q2(d)(ii)

    June 2024 · Paper 5

    1 mark7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(d)(ii): Determine the percentage uncertainty in k. percentage uncertainty in k = % [1]

  9. Q2(e)

    June 2024 · Paper 5

    1 mark7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 5, question 2(e): The experiment is repeated. Determine the speed v that gives a value of f of 987.8 Hz. v = m s–1 [1] [Total: 15] To avoid the issue of disclosure of answer-rela

  10. Q27

    June 2024 · Paper 1

    1 mark7.3 Doppler effect for sound waves
    The whole paper ↗
    June 2024 Paper 1, question 27: The siren of a moving police car emits a sound wave with a frequency of 440 Hz. A stationary observer hears sound of frequency 494 Hz. The speed of sound in the

  11. Q22

    Specimen · Paper 1

    1 mark7.3 Doppler effect for sound waves
    The whole paper ↗
    Specimen Paper 1, question 22: A vehicle emits sound of a constant frequency. A stationary observer hears the sound. The vehicle moves directly towards the observer at constant speed. The obs

  12. Q23

    Specimen · Paper 1

    1 mark7.3 Doppler effect for sound waves
    The whole paper ↗
    Specimen Paper 1, question 23: A car travelling in a straight line at a speed of 30 m s–1 passes near a stationary observer while sounding its horn. The frequency of sound emitted by the horn
All 12 questions on Doppler effect for sound waves, as a list
  1. June 2024, Paper 5, Q2(a) (1 mark): A graph is plotted of 1 f on the y-axis against v on the x-axis. Determine expressions for the gradient and y-intercept. gradient = y-intercept = [1]
  2. June 2024, Paper 5, Q2(b) (2 marks): Values of v1, v2 and f are given in Table 2.1. Table 2.1 1 v1 / m s–1 v2 / m s–1 v / m s–1 f / Hz f / 10–3 Hz–1 3.1 3.9 894.2 6.7 5.9 901.2 9.2 8.2 908.0 11.9 1
  3. June 2024, Paper 5, Q2(c)(i) (2 marks): Plot a graph of 1 f / 10–3 Hz–1 against v / m s–1. Include error bars for v. [2]
  4. June 2024, Paper 5, Q2(c)(ii) (2 marks): Draw the straight line of best fit and a worst acceptable straight line on your graph. Label both lines. [2]
  5. June 2024, Paper 5, Q2(c)(iii) (2 marks): Determine the gradient of the line of best fit. Include the absolute uncertainty in your answer. gradient = [2]
  6. June 2024, Paper 5, Q2(c)(iv) (2 marks): Determine the y-intercept of the line of best fit. Include the absolute uncertainty in your answer. y-intercept = [2]
  7. June 2024, Paper 5, Q2(d)(i) (2 marks): Using your answers to (a), (c)(iii) and (c)(iv), determine the values of fs and k. Include appropriate units. fs = k = [2]
  8. June 2024, Paper 5, Q2(d)(ii) (1 mark): Determine the percentage uncertainty in k. percentage uncertainty in k = % [1]
  9. June 2024, Paper 5, Q2(e) (1 mark): The experiment is repeated. Determine the speed v that gives a value of f of 987.8 Hz. v = m s–1 [1] [Total: 15] To avoid the issue of disclosure of answer-rela
  10. June 2024, Paper 1, Q27 (1 mark): The siren of a moving police car emits a sound wave with a frequency of 440 Hz. A stationary observer hears sound of frequency 494 Hz. The speed of sound in the
  11. Specimen, Paper 1, Q22 (1 mark): A vehicle emits sound of a constant frequency. A stationary observer hears the sound. The vehicle moves directly towards the observer at constant speed. The obs
  12. Specimen, Paper 1, Q23 (1 mark): A car travelling in a straight line at a speed of 30 m s–1 passes near a stationary observer while sounding its horn. The frequency of sound emitted by the horn

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