Question

A compass needle when placed at a magnetic pole stays along:

• A. a) south-north direction only
• B. b) east-west direction only
• C. c) any direction
• D. d) none of above

Answer 1

The correct option is C c) any direction

Given: The needle is at the pole.

Solution: We know that there are two components of Magnetic fields. One is $B_V$ and other is $B_H$. Now at the pole, there is no horizontal component of the magnetic field.

So, $B_H=0$

Since the compass needle rotates in the horizontal plane in which there is no magnetic field. Hence the needle can stay in any direction.

The Correct Opt : {C}