JAMB - Physics (1980 - No. 15)
The name given to the characteristics behavior of substances which set their length perpendicular to a strong magnetic field instead of in line with it is
magnetization
paramagnetism
diamagnetism
demagnetization
ferromagnetism
Forklaring
If diamagnetic substances are placed in a non-uniform magnetic field, then the substances move towards the weaker side of the field from the stronger side.
When a rod of diamagnetic substance is suspended in a uniform magnetic field, it comes to rest with its length perpendicular to the directions of the field