The magnetic flux is given by,
ϕ=BAcosωt. Therefore, induced EMF,
ϵ=−dtdϕ=−BAωsinωt
For maximum current sinωt=1
⇒imax=RBAω=RBNπr2ω=12.562×10−5×1000×3.14×100×2=1A
NEET UG 2022 — Physics Electromagnetism
A big circular coil of 1000 turns and average radius 10m is rotating about its horizontal diameter at 2rads−1. If the vertical component of earth's magnetic field at that place is 2×10−5T and electrical resistance of the coil is 12.56Ω, then the maximum induced current in the coil will be:
Held on 30 Apr 2022 · Verified 9 Jul 2026.
1.5A
1A
2A
0.25A
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