Question

The frequency of a sound source is shifted to higher magnitude when

1.the sound source is moving in a circular path around the listener.

2.the sound source is stationary and the listener is moving away from it.

3.the sound source is moving toward a stationary listener.

4.the sound source is moving away from a stationary listener

Answer 1

If a frequency source moves away or toward a observer then there is a change in frequency of source this is known as doppler effect . As source moves towards the stationary listner the frequency of source increases and the frequency decreases if source moves away from stationary observer and same happen if the observer moves .

There fore option 3 is correct . I.e as sound source moves toward stationary listner the frequency of sound source is shifted to higher magnitude