When electron beam passes through an electric field, they gain kinetic energy. If the same beam passes through magnetic field, then
Their energy increases
Their momentum increases
Their potential energy increases
Energy and momentum both remains unchanged
An electron of charge $‘e’$ coulomb passes through a potential difference of $V$ volts. Its energy in ‘joules’ will be
In a parabola spectrograph, the velocities of four positive ions $P,Q,R$ and $S$ are $v_1$, $v_2$, $v_3$ and $v_4$ respectively
Positive rays consists of
Which of the following will have the least value of $\frac{q}{m}$
A charge of magnitude $3e$ and mass $2m$ is moving in an electric field $\overrightarrow E .$ The acceleration imparted to the charge is