A) \[1.8mA\]
B) \[62V,\,\,2\Omega \]
C) \[63V,\,\,1\Omega \]
D) \[61V,\,\,1\Omega \]
Correct Answer: D
Solution :
Tension in the string should be equal to centripetal force \[T=\frac{m{{v}^{2}}}{r}\] \[V\propto \sqrt{T}\] \[\frac{{{v}_{2}}}{{{v}_{1}}}={{\left( \frac{{{T}_{2}}}{{{T}_{1}}} \right)}^{1/2}}\] \[={{\left( \frac{2{{T}_{1}}}{{{T}_{1}}} \right)}^{1/2}}\] \[{{v}_{2}}=\sqrt{2}{{v}_{1}}=\sqrt{2}\times 5=5\times 1.4\] = 7 cycle/min
You need to login to perform this action.
You will be redirected in
3 sec
