the magnetic moment associate with a circular coil of 35 turns and radius 25 cm if it carries 11A

What is the magnetic induction at the centre of a circular coil of 10 turns, each of radius 5 cm and carrying a current of 5 A ?

The magnetic moment of a circular coil carrying current is

What is the magnetic moment associated with a coil of 1 turn, area of cross-section 10^(-4)m^(2) carrying a current of 2A?

The magnetic moment of a current I carrying circular coil of radius r and number of turns N varies as

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