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_(2)` was increased
C. `T_(1)` was increased
D. `T_(1)` was decreased

Answer

A, B

Explanation

`T_1` and `T_2` are the higher and lowest tensions Now, frequency `propsqrt(tension)`Therefore,frequency produced in wire wiyh tension `T_1` is higher and that with tension `T_2` is lower.if we lower the tension `T_2` then beatfrequency will increase .Therefore the tension `T_1` is decreased.if tension has to be increased,then tension `T_2` should be increased .