CBSE 2023 · Region 3 · Set 1 · Q5 · 1 mark

A particle of mass $\displaystyle m$ and charge $\displaystyle q$ moving with a uniform velocity $\displaystyle \vec{v}=v_{0 x} \hat{i}+v_{0 y} \hat{\mathrm{j}}$ enters a region with a magnetic field $\displaystyle \vec{B}=B_{0} \hat{\mathrm{j}}$. After some time, an electric field $\displaystyle \overrightarrow{\mathrm{E}}=\mathrm{E}_{0} \hat{\mathrm{j}}$ is also switched on in the region. The resulting path described by the particle will be :

CBSE Class 12 Physics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.