A circular coil of radius 40 mm consists of 250 turns of wire in which the current is 20 mA. The magnetic field at the centre of the coil is

A circular coil of a wire containing 100 turns each of radius 2cm carries a current of 0.20A. The magnetic field at the centre of the coil is…..

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?

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?

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 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 wire consisting of 80 turns, each of radius 50 mm carries a current of 0.25 A. What is the magnetic field at the centre 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.

A circular coil of radius 1*5 cm carries a current of 1*5A . If the coil has 25 turns , find the magnetic field at the centre.

A circular coil of radius 1*5cm carries a current of 1*5A . If the coil has 25 turns , find the magnetic field at the centre.