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A simple pendulum having caharge q1 mas...

A simple pendulum having caharge ` q_1` mass ma and effective length `1`, is suspended from a rigid support between the plates of charged horizontal capacitor. Electric field in the capacitor is perpendicular to the plates and directed vertically downwards .

the angle ` alpha` between the equilibrium position of the pendulum and the vertical is given by.

A

` alpha = sin^(-1) [ ((qQE//m)sin theta)/(h + (qE//m) vod theta) ]`

B

` alpha = cos ^(-1) [ ((qQE//m)sin theta)/(h + (qE//m) vod theta) ]`

C

` alpha = tan^(-1) [ ((qQE//m)sin theta)/(h + (qE//m) vod theta) ]`

D

` alpha = cos ^(-1) [ ((qQE//m)sin theta)/(h + (qE//m) vod theta) ]`

Text Solution

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The correct Answer is:
D
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