An electron moves along $+\mathit{x}$ direction. It enters into a region of uniform magnetic field $\mathrm{}\overrightarrow{\mathit{B}}$ directed along $-\mathit{z}$ direction as shown in fig. Draw the shape of trajectory followed by the electron after entering the field.

OR
A square-shaped current-carrying loop MNOP is placed near a straight, long current-carrying wire $\mathit{A}\mathit{B}$ as shown in the fig. The wire and the loop lie in the same plane. If the loop experiences a net force $\mathit{F}$ towards the wire, find the magnitude of the force on the side '$\mathit{N}\mathit{O}$' of the loop.