In Thomson's method of determining $e/m$ of electrons
Electric and magnetic fields are parallel to electrons beam
Electric and magnetic fields are perpendicular to each other and perpendicular to electrons beam
Magnetic field is parallel to the electrons beam
Electric field is parallel to the electrons beam
Energy of electrons can be increased by allowing them
Write name of universal and fundamental particle of matter.
In a Millikan's oil drop experiment the charge on an oil drop is calculated to be $6.35 \times {10^{ - 19}}C$. The number of excess electrons on the drop is
An electron is moving in electric field and magnetic field it will gain energy from
Define work function of metal and write its unit.