Find the EMF in a coil of 50 turns, each of area 80 cm2 when making 1800 revolutions per minute in a uniform field of flux density 6 x 10-3 T.
N = 50, A = 80 cm2= 80 x 10-4 m2,
Area swept out in 1 second, dA = 80 x 10-4 m2 x 30
= -0.072 V or - 72 mV
