Question

The earth’s magnetic field at a given point is 0.5 x10^-5 Wb/m² . This field is to be annulled by magnetic induction at the center of circular conducting loop of radius 5 cm. The current required to be flown in the loop is nearly-

(a) 0.2 A 

(b) 0.4 A 

(c) 4 A 

(d) 40 A

Answer 1

Correct answer is (b) 0.4 A