Magnetic fields at two points on the axis of a circular coil at a distance of `0.05m` and `0.2 m` from the centre are in the ratio `8:1`. The radius of the coil is

The magnetic fields at two points on the axis of a circular coil at distance of 0.05 m and 0.2 m from the centre are in the ratio 8 : 1 . The radius of the coil is

The magnetic flux at two points on the axis of a circular coil at distances 5 cm and 20 cm from the centre are in the ratio 8:1. Find the diameter of the coil.

The intensities of magnetic field at two points on the axis of a bar magnet at distances 0.1m and 0.2 m from its middle point are in the ratio 12.5:1. Calculate the distance between the poles of the magnet.

Magnetic field B on the axis of a circular coil and far away distance x from the centre of the coil are related as :

If B_1 is the magnetic field induction at a point on the axis of a circular coil of radius R situated at adistance R sqrt 3 and B_2 is the magnetic field at the centre of the coil, then ratio of B_1/B_2 is equal to

The magnetic field at a distance x on the axis of a circular coil of radius R is 1/8th of that at the centre. The value of x is