Physics - Magnetism Question with Solution | TestHub

The region between $y=0$ and $y=\mathrm{d}$ contains a magnetic field $\overrightarrow{\mathrm{B}}=\mathrm{B}\hat{\mathrm{z}}$. A particle of mass $\mathrm{m}$ and charge $\mathrm{q}$ enters the region with a velocity $\vec{v}=v\hat{i}.$ if $\mathrm{d}=\frac{\mathrm{m}v}{2\mathrm{qB}},$ the acceleration of the charged particle at the point of its emergence at the other side is :