1.

Distinguish between diamagnetic, para-magnetic and ferromagnetic substances.

Answer»
PROPERTIESDIAMAGNETICPARAMAGNETICFERROMAGNETIC 
StateThey can be solid, liquid or gas.They can be solid, liquid or gas.They are solid.
Effect of MagnetWeakly repelled by a magnet.Weakly attracted by a magnet.Strongly attracted by a magnet.
Behavior under non-uniform fieldtend to move from high to low region.tend to move from low to high field region.tend to move from low to high field region.
Behavior under external fieldThey do not preserve the magnetic properties once the external field is removed.They do not preserve the magnetic properties once the external field is removed.They preserve the magnetic properties after the external field is removed.
Effect of TemperatureNo effect.With the rise of temperature, it becomes a diamagnetic.Above curie point, it becomes a paramagnetic.
PermeabilityLittle less than unityLittle greater than unityVery high
SusceptibilityLittle less than unity and negativeLittle greater than unity and positiveVery high and positive
ExamplesCopper, Silver, GoldLithium, Tantalum, MagnesiumIron, Nickel, Cobalt



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