Questions
A metallic ring is rotating with uniform angular velocity about its diameter in a uniform magnetic field. Then emf induced in the ring is
detailed solution
Correct option is A
At any time to, ϕ=A→.B→=ABcosθ=ABcosωtInduced emf, ε=−dϕdt=AωB.sinωt=AωBsinθEvidently, ε is maximum when θ=90o.and ε=0 when θ=0o.Here A→=Area vector which is perpendicular to the plane of the coil.Talk to our academic expert!
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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