A) \[220{{s}^{-1}}\]
B) \[320{{s}^{-1}}\]
C) \[150{{s}^{-1}}\]
D) \[300{{s}^{-1}}\]
Correct Answer: D
Solution :
Similar to Q. 30 Initial frequency of each wire (n) \[=\frac{\text{(Number}\ \text{of}\ \text{beats}\ \text{heared}\ \text{per}\ \text{sec)}\times \text{200}}{\text{(per}\ \text{centage}\ \text{change}\ \text{in}\ \text{tension}\ \text{of}\ \text{the}\ \text{wire)}}\] \[=\frac{(3/2)\times 200}{1}=300{{\sec }^{-1}}\]
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