The charge density of a uniformly charged infinite plane is $\sigma$. $A$ simple pendulum is suspended vertically downward near it. $A$ charge $q_0$ is placed on the metallic bob. If the angle made by the string with the vertical direction is $\theta$,then . . . . . . .

  • A
    $\sigma \propto \frac{q_0}{\tan \theta}$
  • B
    $\sigma \propto \frac{\tan \theta}{q_0}$
  • C
    $\sigma \propto \tan \theta$
  • D
    $\sigma \propto \frac{\cot \theta}{q_0}$

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