Physics - Electrostatics Question with Solution | TestHub

The line$\mathrm{AA}\text{'}$is on a charged infinite conducting plane which is perpendicular to the plane of the paper. The plane has a surface density of charge$\sigma$and$\mathrm{B}$is a ball of mass$\mathrm{m}$with a like charge of magnitude$\mathrm{q}$.$\mathrm{B}$is connected by a string from a point on the line$\mathrm{AA}\text{'}$. The tangent of the angle$\left(\mathrm{\theta }\right)$formed between the line$\mathrm{AA}\text{'}$and the string is (provided, the charge$\mathrm{q}$does not affect the distribution of charge on conducting plate)