Question

A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.

(a)	(b)	(c)

1. Which trace is due to the loudest sound? Give reason for your answer.
2. Which trace is due for the sound with the lowest pitch? Explain your answer.

Answer 1

1. b, since amplitude is largest
2. a, since frequency is lowest