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PhysicsEMI/ACFaraday law/Lenz lawMedium2 minPYQ_2020
PhysicsMediumnumerical

A circular coil of radius10 cmis placed in a uniform magnetic field of3.0×10-5 Twith its plane perpendicular to the field initially. It is rotated at constant angular speed about an axis along the diameter of coil and perpendicular to magnetic field so that it undergoes half of rotation in0.2 s. The maximum value of EMF induced (inμV) in the coil will be close to the integer....

Answer:
15.00
Solution:

Flux as a function of time ϕ=B·A=ABcos(ωt)

Emf induced,

e=-dϕdt=ABωsin(ωt)

Max. value of Emf = ABω

=πR2Bω

=3.14×0.1×0.1×3×10-5×π0.2=15

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:Faraday law/Lenz law
2mℹ️ Source: PYQ_2020

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