$A$ charge of $Q$ coulomb is placed on a solid piece of metal of irregular shape. The charge will distribute itself:

Two metal spheres of radius $R$ and $3R$ have the same surface charge density $\sigma$. If they are brought in contact and then separated, the surface charge density on the smaller and bigger sphere becomes $\sigma_1$ and $\sigma_2$, respectively. The ratio $\frac{\sigma_1}{\sigma_2}$ is:

What is a Van de Graaff generator? Explain its principle.

$A$ hollow closed conductor of irregular shape is given some charge. Which of the following statements are correct?

By keeping a conductor in an external electric field and from the results obtained by electrostatics,which of the following options is wrong?

$A$ metallic rod is placed in a uniform electric field. Select the correct option.