A coil is wrapped with 200 turns of wire on a square frame withsides 18 cm. A uniform magnetic field is applied perpendicular to the plane of the coil.If the field changes uniformly from 0.50 T to 0 in 8.0 s, find the average value of the induced emf.
A) 2.1 mV
B) 4.1 mV
C) 0.21 V
D) 0.41 V