Which of the following statements about magnetic properties are correct?

ADiamagnetic substances are weakly attracted by a magnetic field.
BParamagnetic substances lose their magnetism when the external field is removed.
CA ferromagnetic substance becomes paramagnetic above its Curie temperature.
DFerrimagnetic substances have a net magnetic moment because opposing moments are unequal.

Answer: B, C, D

Thermal motion destroys domain alignment above the Curie temperature (true). Diamagnetic substances are weakly repelled, not attracted (false). Paramagnetism exists only while the field is applied (true). Unequal antiparallel moments leave a net moment in ferrimagnets (true).

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