CBSE 2025 · Region 7 · Set 1 · Q6 · 1 mark
A metal rod of length $\displaystyle 50$ cm is held vertically and moved with a velocity of $\displaystyle 10 \mathrm{~m} / \mathrm{s}$ towards east. The horizontal component of the Earth's magnetic field at the place is $\displaystyle 0.4$ G . The emf induced across the ends of the rod is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 0 \cdot 2 \mathrm{mV}$
Electromagnetic InductionMotional Electromotive ForceApplymcqmedium
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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.