Figures (a) and (b) show a square loop of side a rotating about the given axes in a uniform magnetic field such that the field is perpendicular to the axis in both cases. Angular speed of rotation is both cases being the same,

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induced emf is more in (a) than in (b)

induced emf in the two cases are equal and non-zero

induced emf in the two cases are equal and zero

induced emf is more in (b) than in (a)

answer is C.

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Detailed Solution

We know that the moment of inertia of a symmetrical planar body about any axis lying in its plane and passing through its centre is same. Further, angular velocity is also same in both cases. Thus, induced emf is also same.

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