Question

When two tuning forks A and B are sounded together x `beats//s` are heard. Frequency A is `n`. Now when one prong of B is loaded with a little wax, the number of beats/s decreases. The frequency of fork B is
A. `n+x`
B. `n-x`
C. `n-x^2`
D. `n-2x`

Answer 1

Correct Answer - A
There aare two possible frequencies `n+x` and `n-x` But only `n+x` satisfied the given conditions.