Calculate the electric field held strength required to just support a water drop of mass `10^(-7) kg` and having a charge of `1.6 xx 10 ^(-19) C`.

Can a body have a charge of 0.8 xx 10^(-19)C ? Justify your answer by comment?

An electric dipole, when held at 30^(0) with respect to a uniform electric field of 10^(4)NC^(-1) experiences a torque of 9x10^(26)Nm. Calculate dipole moment of the dipole.