A short magnet of magnetic moment M, is placed on a straight line. The ratio of magnetic induction fields $B_1, B_3, B_3$ values on this line at points which are at distances 30 cm , 60 cm and 90 cm respectively from the center of the magnet is - Clay6.com, a Free resource for your JEE, AIPMT and Board Exam preparation

A short magnet of magnetic moment M, is placed on a straight line. The ratio of magnetic induction fields $B_1, B_3, B_3$ values on this line at points which are at distances 30 cm , 60 cm and 90 cm respectively from the center of the magnet is