Calculate the torque on a 100 turn rectangular coil of length 40 cm and breadth 20 cm, carrying a current of 10 A, when placed making an angle of `60^@` with a magnetic field of 5 T

Calculate the torque on a 50 turn circular coil of radius 10 cm, when placed with its plane at 60^@ with a magnetic field of 3.1 xx 10^-5 T . The current through the coil is 2 A.

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.

Calculate the magnetic field due to a circular coil of 250 turns and of diameter 0.1m, carrying a current of 7A at the center of the coil .

A rectangular loop of metallic wire is of length a and breadth b and carries a current I . Find the magnitude of magnetic field at the centre O of the loop.

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic moment associated with it.

Calculate the magnetic field at a distance of 5 m from an infinite straight conductor carrying a current of 100 A.

A compass needle free to turn in a horizontal plane is placed at the centre of a circular coil of 30 turns and radius 12 cm. The coil is in a vertical plane making an angle of 45^@ with the magnetic meridian when the current in the coil is 0.35amp., the needle points west to east. The current in the coil is reversed and the coil is rotated about its vertical axis by an angle of 90^@ in the anticlockwise sense looking from above. Predict the direction of the needle. Take the magnetic declination at the places to be zero.

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

A compass needle free to turn in a horizontal plane is placed at the centre of circular coil of 30 turns and radius 12 cm. The coil is in a vertical plane making an angle of 45^@ with the magnetic meridian. When the current in the coil is 0.35 A, the needle points west to east. Determine the horizontal component of the earth’s magnetic field at the location.