Must every magnetic field configuration have a north pole and a south pole? What about the field due to a toroid?

Can you think of a magnetic field configuration with three poles?

What is magnetic field intensity?

Draw magnetic field lines due to a U-shaped magnet?

Given magnetic field due to solenoid on what factors the strength of the field depends?

The earth's magnetic field may be considered to be due to a short magnet placed at the centre of the earth and oriented along the magnetic south-north direction. the ratio of the magnitude of the magnetic field on the earth's surface of magnetic equator to that at the magnetic poles

If a diamagnetic substacne is brought near north or south pole of a bar magnet it is