Explanation
Because, diamagnetic substance moves from stronger magnetic field to weaker field.
Diamagnetic substances are repelled by magnetic field.
The energy lost per unit volume of a substance in a complete cycle of magnetisation is equal to the area of the hysteresis loop.
Susceptibility of diamagnetic substance is negative and it does not change with temperature.
Ferromagnetic substances, magnetised strongly in the direction of magnetic field, paramagnetic substances magnetised weakly in the direction of magnetic field while diamagnetic substance is magnetised weakly in opposite direction of magnetic held.
Domain formation is the necessary feature of ferromagnetism.
Diamagnetic substances are those substances in which resultant magnetic moment in an atom is zero.
A paramagnetic material tends to move from a weak magnetic field to strong magnetic field.
A magnetic material is in the paramagnetic phase a above its Curie temperature.
Typical domain size of a ferromagnetic material is 1 mm,
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