Statement - I : The flux can be altered by changing the shape of a coil in a magnetic field or rotating coil in a magnetic field such that the angle $θ$ between B and A changes.
Statement-II : By changing the shape of a coil or the angle between B and A, an emf is induced in the coil.
Which of the above statement (s) is are correct?
Choose the most appropriate option

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Only II

Neither I nor II

Both I and II

Only I

answer is C.

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Detailed Solution

$ϕ = \vec{B} \cdot \vec{A} = BA cosθ$

If area or angle $θ$ changes or both change , flux linked with the coil changes, which generates e.m.f.

Changing the shape , changes the area of the loop.

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