CBSE 2025 · Region 4 · Set 3 · Q1 · 1 mark
Two point charges Q and -q are held ' r ' distance apart in free space. A uniform electric field $\displaystyle \overrightarrow{\mathrm{E}}$ is applied in the region perpendicular to the line joining the two charges. Which one of the following angles will the direction of the net force acting on charge -q make with the line joining Q and -q ?
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle \tan ^{-1} \frac{4 \pi \varepsilon_{0} \operatorname{Er}^{2}}{\mathrm{Q}}$
Electric Charges and FieldsDipole in a Uniform External FieldAnalysemcqmedium
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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.