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,

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 n turns and radius r carries a current I. The magnetic field at the centre is

A circular coil of radius r carries a current I . It produces magnetic fields B_(1) at the centre of the coil and B_(2) at an axial point at a distance r from the centre. The ratio of B_(1) and B_(2) is

A circular coil of 5 cm radius, number of turns 100 carries a current of 2A. Calculate the magnetic field (a) At the centre of the coil (b) At a distance 10cm from the centre along the axis of the coil

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic field at the centre of the coil.

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 :-

A closely wound, circular coil with radius 2.40 cm has 800 turns. (a) What must the current in the coil be if the magnetic field at the centre of the coil is 0.0580 T ? (b) At what distance x from the centre of the coil, on the axis of the coil, is the magnetic field half its value at the centre?