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Q.

A coil of N turns and mean cross-sectional area A is rotating with uniform angular velocity $ω$ about an axis at right angle to uniform magnetic field B. The induced e.m.f. E in the coil will be

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a

$NB / Asin ωt$

b

$NBAsin⁡ωt$

c

$NBAωsin ωt$

d

$NBωsin ωt$

answer is D.

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Detailed Solution

$ε = NBAωsin ωt (∵ ε = \frac{d ϕ}{d t})$

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