In Millikan's oil drop experiment, an oil drop mass `60 xx 10^(-6) kg` is balanced by an electric field of `10^(6) V//m`. The charge in coulomb on the drop, assuming `g = 10 m//s^(2)` is

If an oil drop of weight 3.2xx10^(-13) N is balanced in an electric field of 5xx10^(5) Vm^(-1) , find the charge on the oil drop.

If an oil drop of weight 3.2xx10^(-13) N is balanced in an electric field of intensity 5xx10^(5) V/m, find the charge on oil drop.

In a Millikan's oil drop experiment, an oil drop of mass 4.9xx10^(-14)kg is balanced by a potential difference of 4000 V between two plates which are 8 mm apart. Find the number of elementary charges on the drop.

In Millikan's experiment an oil drop of mass 4.9xx10^(-14) kg is balanced by applying potential difference of 2kV between the two plates which are 2 mm apart. The charge of the drop is _______.

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 16.35 xx 10^(-19) C . The number of excess electrons on the drop is