Question

A source of sound gives 5 beats per second, when sounded with another source of frequency 100

Answer 1

A source of sound gives 5 beats per second, when sounded with ... A source of sound gives 5 beats per second, when sounded with another source of frequency 100. A source of sound gives 5 beats per second, when sounded with another source of frequency 100 second-1. The second harmonic of the source, together with a source of frequency 205 sec-1 gives 5 beats per second.

Answer 2

Frequency of the source = 100 ± 5 = 105 Hz or 95 Hz. Second harmonic of the source = 210 Hz or 190 Hz. As the second harmonic gives 5 beats/sec with sound of frequency 205 Hz, the second harmonic should be 210 Hz. Þ Frequency of the source = 105 Hz.