Choose the correct statements:
A. Diamagnetic substances have non zero resultant magnetic moment.
B. The magnetisation of a paramagnetic material is inversely proportional to the absolute temperature T.
C. At high enough temperature, a ferromagnet becomes a paramagnet.
D. Magnetic permeability of ferromagnets, $μ >> 1$
E. Susceptibility of Diamagnetic, $X >> 1$
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → B, C & D only
(B) According to curie's law, the magnetization (M) of a paramagnetic material is -
$M∝\frac{1}{T}$
(D) Ferromagnetic materials have very high magnetic permeability (μ). $[μ>>1]$
(C) At a temperature above the curie temperature ($T_c$), the material looses it's ferromagnetic properties, behaves as a paramagnet.