A bar magnet takes π/10 second to complete one oscillation in an oscillation magnetometer. The moment of inertia of the magnet about the axis of rotation is 1.2 × 10–4 kg m2 and the earth’s horizontal magnetic field is 30 μT. Find the magnetic moment of the magnet.
-
Given,
the earth’s horizontal magnetic field,
The moment of inertia of the magnet about the axis of rotation
the time period of a magnetometer is given by,
M = 1600Am2