Question

A strong magnetic field is applied to a stationary electron. Then the electron remains ____________.

Answer 1

1. The magnet force on a moving charge is given by $F=q(v\times B)$, where $q$is charge of electron, $v$ is velocity of electron and $B$ is the magnetic field.
2. Since electron is stationary, its velocity is $0$.
3. So, force on electron $F=q(v\times B)=e(0\times B)=0$.
4. Since net force on the electron is zero, therefore it remains stationary.

Hence, electron remains stationary.