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A simple pendulum of mass m charged nega...

A simple pendulum of mass m charged negatively to q coulomb oscillates with a time period T in a down ward electric field E such that mg `gt` qE..

If the electric field is withdrawn, the new time period

A

`=T`

B

`gtT`

C

`ltT`

D

`T(mg)/(qE)`

Text Solution

Verified by Experts

The correct Answer is:
B
`T=2pisqrt((l)/(g_(ef))),g_(ef)=((mg+qE)/(m))`
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