Q.

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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a

Only II

b

Neither I nor II

c

Both I and II

d

Only I

answer is C.

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Detailed Solution

ϕ=B·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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