A coil of `50` turns and `4cm` radius carries `2A` current then magnetic field at its centre is :- ?

A circular coil of n turns and radius r carries a current I. The magnetic field at the center is

A long solenoid has 20 turns per cm and carries a current i. the magnetic field at its centre is 6.28xx10^(-2)Wb//m^(2) . Another long solenoid has 100 turns per cm and it carries a current i//3 . The value of the magnetic field at its centre is

A long solenoid has 200 turns per cm and carries a current i . The magnetic field at its centre is 6.28xx10^(-2) weber//cm^(2) . Another long soloenoid has 100 turns per cm and it carries a current (i)/(3) . The value of the magnetic field at its centre is

A long solenoid has 200 turns per cm and carries a current of 2.5A. The magnetic field at its centre is

A circular coil of radius R carries a current i . The magnetic field at its centre is B . The distance from the centre on the axis of the coil where the magnetic field will be B//8 is

A circular coil of radius r carries a current I. The magnetic field at its centre is B. At what distance from the centre, on the axis of the coil the magneitc field will be B/27 ?

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A circular coil of 100 turns has a radius of 10 cm and carries a current of 5A. Calculate the magnetic field (a) at the centre of the coil (b) at a point on the axis of the coil at a distanceof 5cm from the centre of the coil.