The length of each side of a square coil of 10 turns is 10 cm. This coil rotates in a magnetic field of induction 0.02 Tesla. If the maximum induced e.m.f. in the coil is 20 mV, then the angular velocity of the coil will be
A. `5 rad//s`
B. `10 rad//s`
C. `2.5 rad//s`
D. `15 rad//s`
