Physics - Magnetism Question with Solution | TestHub

An electron, moving along the$x-$axis with an initial energy of$100 \mathrm{e}\mathrm{V},$enters a region of magnetic field$\overrightarrow{B}=\left(1.5\times {10}^{-3} \mathrm{T}\right)\widehat{k}$at S (see figure). The field extends between$x=0$and$x=2 \mathrm{c}\mathrm{m}.$The electron is detected at the point$\mathrm{Q}$on a screen placed$8 \mathrm{c}\mathrm{m}$away from the point$\mathrm{S}.$The distance d between$\mathrm{P}$and$\mathrm{Q}$(on the screen) is:
(electron’s charge$1.6\times {10}^{-19}\mathrm{ }\mathrm{C}$, mass of electron$=9.1\times {10}^{-31}\mathrm{ }\mathrm{k}\mathrm{g}$)