Problem Set

NBPhO 2026

10. Ball Magnet Exp 10 pts

Electromagnetism · Magnetostatics, Magnetic dipole, Geomagnetism, Paramagnetism

Using a ball-shaped neodymium magnet as a calibrated point dipole, locate its magnetisation axis, measure the strength of the Earth's magnetic field, and extract the magnetic susceptibility of a small titanium wire piece from the force on it in the magnet's inhomogeneous field.

High-level summary by Claude.