CBSE 2025 · Region 3 · Set 1 · Q13 · 1 mark
A wire of length ' $\displaystyle l$ ' is gradually stretched so that its length increases to $\displaystyle 3 l$. If its original resistance is R, then its new resistance will be :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 9$ R
ElectricityFactors on which Resistance DependsApplymcqmedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.