The Earth S Magnetic Field

The time period of oscillation of a magnetic dipole (bar magnet) in a uniform magnetic field is given by: Where:
- is the moment of inertia of the magnet,
- is the magnetic moment,
- is the magnetic field strength. For a uniform bar magnet: If the mass is quadrupled, Hence, the new time period becomes: So, time period becomes twice, and motion remains simple harmonic.