Question

When a tuning fork A f unknown frequency is sounded with another tuning fork B of frequency 256 Hz, 3 beats per second are observed. After that A is loaded with wax and sounded, the beat frequency decreases. Find the frequency of the tuning fork A.

Answer 1

Thus the frequency of tuning fork A will be 259 Hz.

Explanation:

We are given that:

• Let unknown frequency be = A
• Known frequency "B" = 256 Hz
• Number of beats produced "x" = 3

Solution:

Now the difference between nA and nB

nA - nB = x

By changing the sequence

nB - nA = x which is wrong

Now

nA  = nB + x  = 256 + 3 = 259 Hz

Thus the frequency of tuning fork A will be 259 Hz