GATE Overflow for GATE XE - Recent questions in Magnetic Properties

GATE XE 2026 | Question: 51

Tue, 24 Feb 2026 15:45:44 +0000

$\mathrm{Fe}$ has a density of $7.87 \mathrm{~g} . \mathrm{cm}^{-3}$, atomic mass of $55.84 \mathrm{~g} . \mathrm{mol}^{-1}$ and net magnetic moment per atom of $2.22$ Bohr magnetons ( $\mu_{B}$ ). The saturation magnetization of $\mathrm{Fe}$ in $\mathrm{A.m}^{-1}$ is $\_\_\_\_$ $\times 10^{5}$ (rounded off to one decimal place).

Given: $\mu_{B}=9.27 \times 10^{-24} \mathrm{~A} . \mathrm{m}^{2}$, Avogadro number $=6.023 \times 10^{23} \mathrm{~mol}^{-1}$

GATE XE 2025 | Question: 45

Sun, 04 May 2025 19:07:31 +0000

The unit of measurement for magnetic dipole moment of a body is

$\mathrm{A} \: \mathrm{m}^{2}$
$\mathrm{A} \: \mathrm{m}^{-1}$
$\mathrm{Wb} \: \mathrm{m}^{-2}$
$\mathrm{Wb} \: \mathrm{m}^{2}$

GATE XE 2025 | Question: 46

Sun, 04 May 2025 19:07:29 +0000

$B$ is the magnetic flux density and $T_{c}$ is the critical temperature. The Meissner effect is represented by

$\mathrm{B}=0$ at $\mathrm{T} \leq \mathrm{T}_{\mathrm{c}}$
$\mathrm{B}=0$ at $\mathrm{T}>\mathrm{T}_{\mathrm{c}}$
$\mathrm{B} \neq 0$ at $\mathrm{T} \leq \mathrm{T}_{\mathrm{c}}$
$\nabla \mathrm{B}=0$ at $\mathrm{T}=\mathrm{T}_{\mathrm{c}}$

GATE XE 2024 | Question: 39

Sun, 21 Jul 2024 16:42:15 +0000

Which of the following types of materials exhibit(s) positive magnetic susceptibility?

Paramagnetic
Diamagnetic
Ferrimagnetic
Ferromagnetic