A) 60 Hz
B) 360 Hz
C) 10Hz
D) 216 Hz
Correct Answer: B
Solution :
Frequency of revolution of disc \[\frac{{{t}_{2}}}{{{t}_{1}}}=\sqrt{\frac{2}{H}}=\frac{1}{\sqrt{2}}\] \[{{t}_{2}}=\frac{1}{\sqrt{2}}{{t}_{1}}=0.7\times 10=7\min \] \[L=I\omega \] Frequency of emitted sound \[=\frac{2}{5}M{{R}^{2}}\times \frac{2\pi }{T}=\frac{4\pi M{{R}^{2}}}{5T}\] \[U(x)=\left[ \frac{{{x}^{4}}}{4}-\frac{{{x}^{2}}}{2} \right]\] \[U,\frac{dU}{dx}=0\]You need to login to perform this action.
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