Why does a compass needle get deflected when brought near a bar magnet?
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Deflection due to the magnetic field:
The magnetic field is the region in which the influence of magnetism may be felt around a magnet.
A magnetic field is a tool that we use to describe how the magnetic force is dispersed in the space surrounding and within magnetic objects in nature.
The needle of the compass deflects when the magnetic field of the bar magnet intercepts the magnetic field of the needle in the compass as it experiences a different magnetic field which results in the movement of the needle that is either attraction or repulsion.