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The bob of a simple pendulum has mass 2g...

The bob of a simple pendulum has mass `2g` and a charge of `5.0muC`. It is at rest in a uniform horizontal electric field of intensity `200V//m`. At equilibrium, the angle that the pendulum makes with the vertical is:
(take `g=10m//s^(2)`)

A

`tan^(-1)(0.2)`

B

`tan^(-1)(0.5)`

C

`tan^(-1)(5.0)`

D

`tan^(-1)(2.0)`

Text Solution

Verified by Experts

The correct Answer is:
B

`Tcos theta=mg , tan theta=(Eq)/(mg)=(200xx5xx10^(-6))/(2xx10^(-3)xx10)=1/2," "T sin theta=Eqimplies" "theta=tan^-10.5`
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