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Physics · 2025 · 1 mark
CBSE 2025 · Region 4 · Set 3 · Q6
The magnetic flux linked with a closed coil (in Wb ) varies with time t (in s ) as φ=5 t^2+4 t -2. If the resistance of the circuit is 14 Ω, the…
The magnetic flux linked with a closed coil (in Wb ) varies with time t (in s ) as $\displaystyle \phi=5 \mathrm{t}^{2}+4 \mathrm{t}-2$. If the resistance of the circuit is $\displaystyle 14 \Omega$, the magnitude of induced current in the coil at $\displaystyle \mathrm{t}=1 \mathrm{~s}$ will be :
Official answer
(B)
1.$\displaystyle 0$ A
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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.