A charge q is circulating with a constant speed v in a semicircular loop of wire of radius R. The magnetic moment of this loop is

A charge 2Q is circulating with constant speed 2X in a semicircular loop of wire of radius r. The magnetic moment of this loop is

A charge q is circulating with constant speed v in a semicular loop of wire of radius R the magnetic moment of this loop is

Magnetic field at the centre of circular loop of radius R is B. Magnetic moment of this coil would be _______

Magnetic induction produced at the center of a circular loop of radius R carrying a current is 'B' The magnetic moment of the loop is