The magnetic moment of a current (i) carrying circular coil of radius (r) and number of turns (n) varies as

The magnetic moment of a current carrying circular coil of radius r varies as

The direction of magnetic moment of a current carrying circular coil is

The direction of magnetic moment of a current carrying circular coil is

The magnetic moment of a circular coil carrying current is

If the current (I) flowing through a circular coil, its radius (R ) and number of turns (N) in it are each doubled, magnetic flux density at its centre becomes:

Magnetic dipole moment of current carrying circular coil is ...... length of wire of coil.