Electron volt is a unit of
Potential
Charge
Power
Energy
The specific charge of an electron is
$1$ $J$ is equal to how many electron volt?
Order of q/m ratio of proton, $\alpha $ -particle and electron is
Cathode rays are produced when the pressure is of the order of
Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be