CBSE 2024 · Region 3 · Set 1 · Q2 · 1 mark

A proton is taken from point $\displaystyle \mathrm{P}_{1}$ to point $\displaystyle \mathrm{P}_{2}$, both located in an electric field. The potentials at points $\displaystyle \mathrm{P}_{1}$ and $\displaystyle \mathrm{P}_{2}$ are -$\displaystyle 5$ V and +$\displaystyle 5$ V respectively. Assuming that kinetic energies of the proton at points $\displaystyle \mathrm{P}_{1}$ and $\displaystyle \mathrm{P}_{2}$ are zero, the work done on the proton is :

CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.