A simple pendulum of period \( T \) has a metal bob which is negatively charged. If it is allowe...

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A simple pendulum of period \( T \) has a metal bob which is negatively charged. If it is allowed to oscillate above a positively charged metal plate, its period winl
(A) remait equal to \( T \)
(B) be less than \( T \)
(C) be greater than \( T^{\circ} \)
(D) be infinite
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