VITEEE 2025 | Magnetism and Matter Question 1 | Physics

A cylindrical magnet has a length of 15 cm and diameter 3 cm . If it has uniform magnetisation of $4.0 \times 10^3 \mathrm{Am}^{-1}$, then magnetic dipole moment is

$0.42 \mathrm{JT}^{-1}$

$0.84 \mathrm{JT}^{-1}$

$0.21 \mathrm{JT}^{-1}$

$0.58 \mathrm{JT}^{-1}$

VITEEE 2024

MCQ (Single Correct Answer)

-1

A short bar magnet of magnetic moment of $0.15 \mathrm{~J} / \mathrm{T}$ is placed in a uniform magnetic field of 0.4 T . The potential energy of the magnet in unstable equilibrium is

$6 \times 10^{-4} \mathrm{~J}$

$-6 \times 10^{-2} \mathrm{~J}$

$6 \times 10^{-2} \mathrm{~J}$

$-6 \times 10^{-4} \mathrm{~J}$

VITEEE 2023

MCQ (Single Correct Answer)

-1

Susceptibility of ferromagnetic substance is

> 1

< 1

VITEEE 2023

MCQ (Single Correct Answer)

-1

The susceptibility of a magnetism at $$300 \mathrm{~K}$$ is $$1.5 \times 10^{-5}$$. The temperature at which the susceptibility increases to $$4.5 \times 10^{-5}$$ is

150 K

100 K

50 K

20 K

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