Radius of current carrying coil is 'R'. Then ratio of magnetic fields at the centre of the coil to the axial point, which is `Rsqrt(3)` distance away from the centre of the coil :-

The magnetic field at the centre of the current carrying coil

The magnetic field at the centre of the current carrying coil

A circular coil of radius 2R is carrying current 'i' . The ratio of magnetic fields at the centre of the coil and at a point at a distance 6R from the centre of the coil on the axis of the coil is

A circular coil of radius 2 R is carrying current 'i'. The ratio of magnetic fields at the centre of the coil and at a point at a distance 6 R from the the centre of the coil on the axis of the coil is,

The magnetic field at the centre of current carrying coil is

The magnetic field at the centre of the current carrying coil :

The magnetic field at the centre of the current carrying coil is

The magnetic field at the centre of the current carrying coil is