Magnetization and Magnetic Intensity

The following figure shows the variation of intensity of magnetisation $\mathrm{I}$ versus the applied magnetic field intensity $\mathrm{H}$, for two magnetic materials $\text{A}$ and $\text{B}$

Which of the material have a larger susceptibility for a given field at constant temperature?

The susceptibility of a perfectly diamagnetic substance is

The permeability of a specimen decreases drastically above certain temperature. The specimen could be

The magnetic susceptibility of a paramagnetic substance at $-173 \mathrm{℃}$ is $1.5\times {10}^{-2}$, then it's value at $-73 \mathrm{℃}$ will be:

For super conductors, magnetic susceptibility is -

The relative permeability $\left({\mu }_r\right)$ of a ferromagnetic substance varies with temperature $\left(T\right)$ according to the curve,

Susceptibility of a diamagnetic substance is

Relative permeability of iron is $5500$. Its magnetic susceptibility is

If number of turns, area and current through a coil are given by $n, A$ and $I$ respectively, then its magnetic moment is given by

Susceptibility of $\mathrm{Mg}$ at $300 \mathrm{K}$ is $1.2\times {10}^{-5}.$ The temperature at which susceptibility will be $1.8\times {10}^{-5}$ is :

Assertion: Earth's magnetic field inside a closed iron box is less than compared to the outside.
Reason: The magnetic permeability of iron is low.

Magnetization of the sample is

Choose the INCORRECT statement

A rod of ferromagnetic material with dimensions $10 \mathrm{cm}\times 0.5 \mathrm{cm}\times 0.2 \mathrm{cm}$ is placed in a magnetic field of strength $0.5\times {10}^4 {\mathrm{Am}}^{-1}$ as a result of which a magnetic moment of $5 {\mathrm{Am}}^2$ is produced in the rod. The value of magnetic induction will be :-

If the magnetic flux is expressed in weber, then the magnetic induction can be expressed in 

Assertion : MnO₂ is ferromagnetic.
Reason : Domains are equally aligned in parallel and anti parallel direction

Assertion : Ferromagnetic substances attracts the external magnetic field lines
Reason : Permeability of ferromagnetic substance is Iow. 

Assertion : The susceptibility of diamagnetic materials does not depent upon temperature, Reason : Every atom of a diamagnetic material is not a complete magnet in itsself. 

Assertion : A magnet may levitated above a superconducting material
Reason : There is always repulsive force between a diamagnet and a magnet! that produces non uniform magnetic field 

Assertion : The permanent magnetic moment of the atoms of a material is zero. The material must be diamagnetic.
Reason : Hard magnetic materials have high retantivity high, coresivity and high hysteresis loss & are suitable for permanent magnet.