A) \[195Hz\]
B) \[251Hz\]
C) \[150Hz\]
D) \[300Hz\]
Correct Answer: A
Solution :
\[{{\text{L}}_{\text{1}}}\text{=0}\text{.95m,}\,\,{{\text{L}}_{\text{2}}}\text{=1m}\] \[{{\text{L}}_{2}}>{{L}_{1}},{{n}_{1}}>N>{{n}_{2}}\] \[{{n}_{1}}-N=5andN-{{n}_{2}}=5\] On solving \[{{n}_{1}}-{{n}_{2}}=10\] \[{{n}_{2}}={{n}_{1}}-10\] By law of length of vibrating string \[{{n}_{1}}{{L}_{1}}={{n}_{2}}{{L}_{2}}\] On solving we get\[{{n}_{1}}=200Hz\] \[{{n}_{1}}-N=5\] \[N=195Hz\]
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