CBSE 2025 · Region 5 · Set 1 · Q2 · 1 mark
The electric field at a point in a region is given by $\displaystyle \overrightarrow{\mathrm{E}}=\alpha \frac{\overrightarrow{\mathrm{r}}}{|\overrightarrow{\mathrm{r}}|^{3}}$, where $\displaystyle \alpha$ is a constant and r is the distance of the point from the origin. The magnitude of potential of the point is:
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle \frac{\alpha}{\mathrm{r}}$
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.