CBSE 2025 · Region 4 · Set 1 · Q13 · 1 mark
An electric bulb is rated $\displaystyle 220 \mathrm{~V} ; 11 \mathrm{~W}$. The resistance of its filament when it glows with a power supply of $\displaystyle 220$ V is :
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle 4400 \Omega$
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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.