CBSE 2025 · Region 7 · Set 1 · Q1 · 1 mark
Two horizontal plates, separated by $\displaystyle 1$ cm , are arranged one above the other. A particle of mass $\displaystyle 5$ mg and charge $\displaystyle 2$ nC is released in air between the plates. The potential difference that should be applied to the plates so that the particle remains suspended between them, is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle 250$ V
Electrostatic Potential and CapacitanceThe Parallel Plate CapacitorApplymcqmedium
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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.