A dynamo coil rotates 4200 rotation per minute in a magnetic flux of flux density 0.05 Tesla. If the number of turns of the coil is 100 turns and the area of each of them is 25 cm². Calculate:
A. The maximum value of the e.m.f.
B. Its effective value
C. The instantaneous value of the e.m.f. when the coil rotates 1/12 rotation from the perpendicular plane?