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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-9702-WA2-0012 marksL1 FoundationCalculatorDoppler effect
A 500500 Hz siren moves towards a stationary observer at 2020 m s⁻¹. The speed of sound is 340340 m s⁻¹. Calculate the observed frequency.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0022 marksL1 FoundationCalculatorDoppler effect
The same 500500 Hz siren moves away from the observer at 2020 m s⁻¹. Calculate the observed frequency. (v=340v=340 m s⁻¹)

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0031 markL1 FoundationCalculatorDoppler effect
A source of sound moves towards a stationary observer. Compared with the source frequency, the observed frequency is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0041 markL1 FoundationCalculatorDoppler effect
In front of a moving sound source, compared with a stationary source, the wavelength is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0071 markL1 FoundationCalculatorDoppler effect
Light from a distant galaxy is redshifted. This shows that the galaxy is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0091 markL1 FoundationCalculatorDoppler effect
The Doppler effect for a moving sound source is caused by
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0121 markL1 FoundationCalculatorDoppler effect
A source and observer are both at rest. The observed frequency is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0052 marksL2 StandardCalculatorDoppler effect
An 800800 Hz siren moves away from a stationary listener at 3030 m s⁻¹. Calculate the frequency heard. (v=340v=340 m s⁻¹)

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0062 marksL2 StandardCalculatorSource speed
A 500500 Hz source moving towards a stationary observer is heard at 550550 Hz. Calculate the speed of the source. (v=340v=340 m s⁻¹)

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0083 marksL2 StandardCalculatorDoppler effect
A train sounds a 400400 Hz horn while passing a stationary observer at 2525 m s⁻¹. Calculate the difference between the frequencies heard as it approaches and as it recedes. (v=340v=340 m s⁻¹)

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0102 marksL2 StandardCalculatorDoppler effect
A 500500 Hz source moves at 2020 m s⁻¹. Calculate the wavelength of the sound directly in front of it. (v=340v=340 m s⁻¹)

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-WA2-0113 marksL3 ExamCalculatorSource speed
A car's horn is heard at 470470 Hz as the car approaches and 430430 Hz as it moves away. The speed of sound is 340340 m s⁻¹. Calculate the speed of the car.

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Salam Academy Original Practice · Proposed mark scheme