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Question

The phase difference between the flux linkage and the induced e.m.f. in a rotating coil in a uniform magnetic field is:

A
π
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B
π2
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C
π4
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D
π6
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Solution

The correct option is B π2
ϕ=BA cosθ where θ is the angle between area and field
e=dϕdt=BAsinθ.dθdt=BA(dθdt)cos(90+θ)
Here phase difference = 90.

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