Physics (AS & A Level) · May / June 2023 · Paper 12 · Question 20

A microphone detects a sound wave. The microphone is connected to a cathode-ray oscilloscope (CRO). The shape of the trace on the screen of the CRO is shown. Which property of the sound wave can be determined by using only the measurement of a horizontal distance on the screen and the value of a control setting of the CRO?

1. Aamplitude
2. Bfrequency
3. Cspeed
4. Dwavelength

As printed in the paper