A moving coil galvanometer has a rectan- gular coil of dimensions 0.02 m × 0.05m. It consists of 200 turns. The coil is placed in a uniform radial field of 0.5 T. The restoring torque per angular twist is 106 Nm per degree. What is the minimum current measured by it if its coil turns through 45°?

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Magnetic Moment

The magnetic moment is defined as the alignment of a magnet and its strength when the magnet is creating a magnetic field. There are number of examples of the magnetic moment, few are a current carrying conductor in the form of coil, elements at microscopic levels like electrons and many more.