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Figure shows a ring of radius ‘a’ at t = 0, present in a uniform magnetic field B. The magnetic field is present everywhere parallel to the axis yy'  . If ring starts rotating with an angular speed   ω about axis   yy', the induced emf in ring is 
 

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By Expert Faculty of Sri Chaitanya
a
π a2B ω sin ωt
b
π a2B ω cos ωt
c
π a2B ω
d
Zero

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detailed solution

Correct option is D

Flux over the ring is always zero
ctaimg

ctaimg

Similar Questions

A loop, having area 20cm2, is made of thin copper wire. If is placed in a uniform magnetic field of induction 1.5 Tesla with its plane perpendicular to the field. If area of the loop increases to 30 cm2 in 0.5 second, average emf induced in the loop is

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