Question

i. Define Curie temperature.
ii. If magnetic susceptibility of a certain magnetic material is $0.0001$, find its relative permeability.

Answer 1

(i) Curie temperature : The temperature above which a ferromagnetic material behaves like a paramagnetic material is defined as Curie temperature $\left(T_C\right)$.
(ii) Given,
Magnetic susceptibility $X_m=0.001$
Let, relative permeability be $\mu$
We know that,
$\mu ={\mu }_0(1+X_m)$
$=4\pi \times {10}^{-7}(1+0.0001)$
$=4\pi \times {10}^{-7}\times 1.0001$
$=1.256\times {10}^{-6}H{m}^{-1}$