Positive rays consists of
Electrons
Neutrons
Positive ions
Electro magnetic waves
An electron is moving in electric field and magnetic field it will gain energy from
In $1897$, J.J.Thomson invented which particle ?
An electron beam is moving between two parallel plates having electric field $1.125 \times {10^{ - 6}}N/m$. A magnetic field $3 \times {10^{ - 10}}T$ is also applied so that beam of electrons do not deflect. The velocity of the electron is ............ $m/s$
When electron beam passes through an electric field, they gain kinetic energy. If the same beam passes through magnetic field, then