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Physics · 2025 · 1 mark
CBSE 2025 · Region 1 · Set 1 · Q4
A coil has 100 turns, each of area 0.05 m^2 and total resistance 1.5 Ω. It is inserted at an instant in a magnetic field of 90 mT, with its axis…
A coil has $\displaystyle 100$ turns, each of area $\displaystyle 0.05 \mathrm{~m}^{2}$ and total resistance $\displaystyle 1.5 \Omega$. It is inserted at an instant in a magnetic field of $\displaystyle 90$ mT, with its axis parallel to the field. The charge induced in the coil at that instant is:
Official answer
(B)
0.$\displaystyle 30$ C
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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.