Question

A coil of area 0.15m2 and 50 turns is perpendicular to a magnetic field, which changes from 5X10-3 to 2X10-3T in 30ms. Calculate the induced emf.

Answer 1

Answer:

Area of cross- section, A = 50 cm2 = 50 x 10-4 m2

No. of turns, N = 100 turns

Magnetic field, B = 10-2 Wb/m2

time, t = 40 milli seconds = 40 x 10-3 seconds.

Flux, Φ1 = BA = 10-2 = 50 x 10-4 = 5 x 10-5 Wb.

Φ= 0