Question

A coil having 500 square loops each of side 10 cm is placed normal to a magnetic flux which increases at the rate of 1.0 tesla/second. The induced e.m.f. in volts is(a) 0.1(b) 0.5(c) 1(d) 5

Answer 1

answer option (d) 5V


explanation : number of turns = 500

cross sectional area of square coil = 10² cm² = 10^-2 m²

magnetic field normal to the square coil changes at the rate, [tex]\frac{dB}{dt} = 1 T/s

so, the induced emf , e = - NA × dB/dt

where N denotes number of turns , A denotes cross sectional area of coil and dB/dt is the rate of change of magnetic field.

= - 500 × 10^-2 × 1 V

= - 5 V

hence, induced emf in volts will be 5 V