Physics (AS & A Level) · May / June 2016 · Paper 13 · Question 24

When a car travelling with constant velocity passes a stationary observer, the observer hears a change in the frequency of the sound emitted by the car. Which statement is correct?

1. AThe change in frequency is greater as the car moves away than as it approaches.
2. BThe greater the speed of the car, the greater the change in observed frequency.
3. CThe observed frequency is lower as the car moves towards the observer and higher as the car moves away from the observer.
4. DThe volume of the sound heard by the observer does not change as the car approaches.

As printed in the paper