A circular coil of one turn in formed by a 6.28 m length wire, which carries a current of 3.14 A. the magnetic field at the center of coil is :-
The magnetic field due to circular coil of 200 turns of diameter 0.1 m carrying a current of 5 A at a point on the axis of the coil at a distance 0.15 m from the center of the coil will be