Question

A tuning fork produces 4 beat per second with another fork of frequency 288cps.A little wax is placed on the unknown fork and then it produces 2 beats per second

Answer 1

It is given that frequency of the first fork is 288cps mean 288hz.Now if second fork produce 4 beat per second .

So the possible frequency of another fork can be 284 or 292.

But after applying wax, the frequency of second fork will decrease.

So if frequency of second fork is 284 then after applying wax it's frequency should increase and as a result. So the answer should be 292