Two identical straight wires are stretched so as to products `6 beats// s` when vibrating simultaneously. On changing the tension slightly in one of them, the beat frequency remains unchanged. Denoting by , `T_(1)` the higher and `T_(2)` the lower, initial tensions in the strings, then it could be said that that while making the above changes in tension

Options

A. `T_(2)` was decreased
B. `T_(1)` was increased
C. both `T_(1) and T_(2)` were increased
D. either `T_(2)` was increased or `T_(1)` was decreased

Answer

D

Explanation

Eithere , frequency of first wire should decrease or frequency of second wire should increase.