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Physics · 2025 · 1 mark
CBSE 2025 · Region 4 · Set 3 · Q1
Two point charges Q and -q are held ' r ' distance apart in free space. A uniform electric field E is applied in the region perpendicular to the line…
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
(A)
$\displaystyle \tan ^{-1} \frac{4 \pi \varepsilon_{0} \operatorname{Er}^{2}}{\mathrm{Q}}$
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.