A conducting circular loop is placed in a uniform magnetic field B=.025T with its plane perpendicular to the loop.The radius of the loop is made to shrink at a constant rate of 1mm/s.The induced emf when then radius is 2cm ?

Dear Student,
Please find below the solution to the asked query:
 Magnetic flux:ϕ=BA  =Bπr2Induced emf:E=dt=ddtπr2B=2πrBdrdt=2π×2×10-2×0.025×10-3=π×10-6 V=π μV
Hope this information will clear your doubts about Induced emf.
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