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The bob of a pendulum of mass m, suspend...

The bob of a pendulum of mass m, suspended by an inextensible string of length L as shown in the figure carries a small charge q. An infinite horizontal plane conductor with uniform surface charge density `sigma` is placed below it. What will be the time period of the pendulum for small amplitude oscillations?

A

`2pisqrt(L/((g-(mq)/(epsilon_(0)sigma))))`

B

`sqrt(L/((g-(mqsigma)/(epsilon_(0)))))`

C

`1/(2pi)sqrt(L/((g-(qsigma)/(epsilon_(0)m))))`

D

`2pisqrt(L/((g-(qsigma)/(epsilon_(0)m))))`

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