The magnetic field due to the earth is closely equivalent to that due to

Magnetic field due to ring

The magnetic field due to a bar magnet _____

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

Magnetic Field due to Circular Coil

Magnetic Field due to Circular Coil

Do you know solenoid? Can you compare the magnetic field due to a current carrying solenoid with that due to a bar magnet?

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

The magnetic field due to a current element is independent of :