What is the difference between magnetic meridian, magnetic equator and equatorial meridian of apermanent bar magnet?

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Solution

Magnetic meridian:
A vertical plane passing through the magnetic axis of a freely suspended magnet is called magnetic meridian.
Magnetic equator:
The magnetic equator is the line where the inclination is zero i.e. the magnetic field is horizontal and magnetic axis is a line through the centre of a magnet such that the torque exerted on the magnet by a magnetic field in the direction of this line equals zero.

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