If only one charge is available, can it be used to obtain a charge many times greater than itself in magnitude?

(a) Can two bodies having like charges attract each other?

(b) Can a charged body attract an uncharged body?

(c) Two identical metallic spheres of exactly equal masses are taken. One is given a positive charge $q$ and the other is given an equal negative charge. Their masses after charging are different. Comment on the statement.

A particle has a charge of $+{10}^{-12} \mathrm{C}$.

(a) Does it contain more or less number of electrons as compared to the neutral state?

(b) Calculate the number of electrons transferred to provide this charge.

An ebonite rod is rubbed with fur and is found to have a charge of $-3.2\times {10}^{-8 } \mathrm{C}$ on it.

(a) Calculate the number of electrons transferred.

(b) What is the charge on the fur after rubbing?