A) \[190cm\]
B) \[180cm\]
C) \[220cm\]
D) \[200cm\]
Correct Answer: D
Solution :
| [d] Frequency of tuning fork \[=256Hz\] |
| Frequency of open pipe \[=256\pm 1Hz\] |
| Frequency of third normal mode of vibration of an open pipe is\[v=\frac{3v}{2l}\] |
| here \[l\text{ }=\]length of pipe |
| \[\frac{3\times 340}{2\times l}=255\] |
| \[l=200cm\] |
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