When an external magnetic field applied to a paramagnetic substance is slowly switched off
PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter
Problem
When an external magnetic field applied to a paramagnetic substance is slowly switched off, how does the magnetisation of the substance change?
(a) It remains large and permanent
(b) It falls to zero almost immediately
(c) It falls to a small but non-zero residual value
(d) It slowly increases due to hysteresis