Question

A bar magnet of length 14 cm is placed along N-S direction with north of magnetic along north direction. If horizontal component of earth magnetic field is 0.4 G. If at distance 18 cm from centre of magnet a null point is located. Then magnetic moment of magnet is :

(1) 2.88 Am² (2) 1.88 Am² (3) 4.88 Am² (4) 3.88 Am²

Answer 1

The correct option is 1) 2.88 Am²