The direction of the null points is on the equatorial line of a bar magnet, when the north pole of the magnet is pointing
A) North
B) South
C) East
D) West
Correct Answer:
A
Solution :
\[{{N}_{I}}\]and \[{{N}_{2}}\]are two null points. And \[{{B}_{m}}=\]Horizontal component of earths? magnetic field B = Magnetic field due to bar magnet.