Electron volt is a unit of

In Millikan’s oil drop experiment, an oil drop of mass $16 \times {10^{ – 6}}kg$ 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

An electron is moving with constant velocity along $x – $ axis. If a uniform electric field is applied along $y – $ axis, then its path in the $x – y$ plane will be

Which particles are responsible for conductivity of metals ?

An electron is moving in electric field and magnetic field it will gain energy from