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Question

A square loop of side a is rotating about its diagonal with angular velocity ω in a perpendicular magnetic field B. It has 10 turns. The emf induced is

206799_b0f9eaf45c0e4e40896e875e61c8bbae.png

A
Ba2sinωt
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B
Ba2cosωt
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C
52Ba2
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D
10Ba2sinωt
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Solution

The correct option is B 10Ba2sinωt
ϕ=nBAcosθ=10Ba2cosωt
e=dϕdt
=ddt(10Ba2cosωt)
=10Ba2sinωt(ω)

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