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

1. A. 1.6 v
2. B. 3.2 v
3. C. 4.8 v
4. D. 0.8 v

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