A rectangular coil abcd is rotated anticlockwise with uniform angular velocity about the axis
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Answer:
Let the angle between magnetic field and the line perpendicular to the surface of rectangular coil be θ.
Hence the flux through the coil is ϕ=
B
.
A
=BAcosθ
Hence the induced emf=Rate of change of flux=−
dt
dϕ
=BAsinθ
dt
dθ
=BAωsinθ
Hence it is minimum when θ=0
∘
,180
∘
Which means when the plane of coil is at right angle to the magnetic field.
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