A) \[195Hz\]
B) \[251Hz\]
C) \[150Hz\]
D) \[300Hz\]
Correct Answer: A
Solution :
| [a] \[{{\text{L}}_{\text{1}}}\text{=0}\text{.95m,}\,\,{{\text{L}}_{\text{2}}}\text{=1m}\] |
| \[{{\text{L}}_{2}}>{{L}_{1}},{{n}_{1}}>N>{{n}_{2}}\] |
| \[{{n}_{1}}-N=5andN-{{n}_{2}}=5\] |
| 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\[{{n}_{1}}=200Hz\] |
| \[{{n}_{1}}-N=5\] |
| \[N=195Hz\] |
You need to login to perform this action.
You will be redirected in
3 sec
