Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?

Why does the paramagnetic nature of the 3d transition series increase till Cr and then decrease regularly?

Why does a diamond sparkle with great brilliance? Or, Why does a diamond cut in the same fashion shine more brightly than a piece of glass?

A paramagnetic sample shows a net magnetisation of 8A.m^(-1) when placed in an external magnetic field of 0 .6T at a temperature of 4 K . When the same sample is placed in an external magnetic field of 0.2T at a temperature of 16 K , the magnetisation would be

If the magnetic moment of a straight magnetised wire is p_(m) , what will be its magnetic moment when the wire is bent in the form of a semicircle ?

In a ferromagnetic substance a magnetising force field of 360 Am^-1 produces a magnetic flux density of 0.6 T. The magnetic susceptibility of the substance is—

Which of the following substances can exist in a permanently magnetised state even when the magnetic field is removed, and why? (i) Paramagnetic (ii) Ferromagnetic (iii) Ferrimagnetic