Question

What is meant by the term magnetic field ? why does a compass needle show deflection when brought near a bar magnet?

Answer 1

Magnetic field is a field of positive charge at huge level. The compass needle is deflected due to changes to the pole of bar magnet

Answer 2

♤ Compass needle is a tiny pivoted magnet

♤ it experienced a force exerted by a magnetic field set due to a bar magnet.

♤ due to this magnetic force compass needle gets deflected when it is brought ear to a bar magnet.