Liquid oxygen at its boiling point has a tabulated volume magnetic susceptibility…
PHYSICS · Multi-part · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Magnetic materials · Magnetic materials
The Boundary-Value Problem, Ch Magnetisation, bound currents and H, completed
Problem
Liquid oxygen at its boiling point has a tabulated volume magnetic susceptibility χm=+3.5×10−3 (positive, from standard reference tables). A sample is shaped as a thin disc and placed in a magnetometer that applies a uniform field H0 and reports χapp=M/H0.
((a)) Find χapp when the applied field is normal to the flat face of the disc (Na=1).
((b)) Find χapp when the applied field lies in the plane of the disc (Na≈0).
((c)) State the fractional error made by reading off χm directly from the normal-field measurement without correction.