A) 1.22 v
B) 0.61 v
C) 1.50 v
D) 0.75 v
Correct Answer: A
Solution :
Speed of sound in a stretched string \[v=\sqrt{\frac{T}{\mu }}\] ?(i) Where \[T\] is the tension in the string and \[\mu \]is mass per unit length. According to Hooke?s law, \[F\propto x\] \ \[T\propto x\] ?(ii) From (i) and (ii) \[v\propto \sqrt{x}\]\\[v'=\sqrt{1.5}\ v=1.22\ v\]
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