Two identical straight wires are stretched so as to produce $$6$$ beats per second when vibrating simultaneously. On changing the tension in one of them, the beat frequency remains unchanged. Denoting by $$T1$$, $$T2$$ , the higher and the lower initial tensions in the strings, then it could be said that while making the above change in tension

Question

Infinity Learn · Accepted Answer

Using $$n=12lTm$$; As  $$T1$$>$$T2$$⇒$$n1$$>$$n2$$  giving $$n1$$−$$n2=6The$$ beat frequency of $$6$$ will remain fixed when (i)  $$n1$$ remains same but $$n2$$ is increased to a new value (n2$$'−$$n2=12) by increasing tension $$T2$$.(ii) $$n2$$ remains same but $$n1$$ is decreased to a new value (n1-n1$$'$$=12)  by decreasing tension $$T1$$.

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