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 
, the higher and the lower initial tensions in the strings, then it could be said that while making the above change in tension
was decreased
was increased
was increased
was kept constant
Text Solution
Verified by ExpertsB
Using 
;
As 
⇒ ⇒ 
giving 
The beat frequency of 6 will remain fixed when
(i) 
remains same but 
is increased to a new value 
by increasing tension 
.
(ii) n 2 remains same but n 1 is decreased to a new value 
by decreasing tension T 1 .
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