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A conducting circular loop is placed in a uniform magnetic field 0.04 T with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at 2 mms-1. The induced emf in the loop when the radius is 2 cm is

(a) 3.2 πμV                                      (b) 4.8 πμV

(c) 0.8 πμV                                      (d) 1.6 πμV

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