MagnetismHard
Question
very small bar magnet is placed in the magnetic meridian with its north pole pointing towards north. The null point is, obtained 20 cm away from the centre of the magnet. If the earth′s magnetic field (horizontal component) at this point be 0.3 gauss, the magnetic moment of the bar magnet is
Options
A.8 × 102 e.m.u
B.1.2 × 103 e.m.u
C.2.4 × 103 e.m.u
D.3.6 × 103 e.m.u
= BH ⇒ M = 
More Magnetism Questions
A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of t...A rectangular loop carrying a current i1, is situated near a long straight wire carrying a steady current i2. The wire i...A particle of charge -16×10-18 coulomb moving with velocity 10 ms-1 along the x-axis enters a region where a magnet...A thin flexible wire of length L is connected to two adjacent fixed points and carries a current I in theclockwise direc...A particle of mass M and charge Q moving with velocity describes a circular path of radiusR when subjected to a uniform ...