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A simple pendulum consists of a small sp...

A simple pendulum consists of a small sphere of mass `m` suspended by a thread of length `l`. the sphere carries a positive charge `q`. The pendulum is placed in a uniform electric field of strength `E` directed vertically upwards. With what period will pendulum oscillate if the electrostatic force acting on the sphere is less than the gravitational force ?

Text Solution

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The correct Answer is:
`(T=2pi sqrt((l)/(g-qE//m)))`
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