[MCQ/EM-04004] EM-PROBLEM

A charge \( q\) of mass $m$ is kept at a distance \(d\) below a grounded
infinite conducting sheet which lies in the \(xy\) plane. For what value of
\(d\) will the charge remain stationary?

1.   \( \frac{q}{4\sqrt{mg\pi \epsilon_0}}\)
2.   \( \frac{q}{\sqrt{mg\pi \epsilon_0}}\)
3.   There is no finite value of \(d\)
4.   \(\frac{\sqrt{mg\pi \epsilon_0}}{q}\)

CSIR June 2014