Magnetic materials

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has

Given below are two statements :

Statement I : Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature.

Statement II : Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field.

Choose the correct answer from the options given below :-

The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m, is :

[Permeability of free space $\mu_0=4\pi\times10^{-7}$ Wb/A-m]

The space inside a straight current carrying solenoid is filled with a magnetic material having magnetic susceptibility equal to $1.2\times10^{-5}$. What is fractional increase in the magnetic field inside solenoid with respect to air as medium inside the solenoid ?

Hysteresis loops for two magnetic materials A and B are given below :

These materials are used to make magnets for electric generators, transformer core and electromagnet core. Then it is proper to use :

A 25 cm long solenoid has radius 2 cm and 500 total number of turns. It carries a current of 15 A. If it is equivalent to a magnet of the same size and magnetization $\vec M$ (magnetic moment/volume), then $|\vec M|$ is :

Three identical bars A, B and C are made of different magnetic materials. When kept in a uniform magnetic field, the field lines around them look as follows :

Make the correspondence of these bars with their material being diamagnetic (D), ferromagnetic (F) and paramagnetic (P) :

An example of a perfect diamagnet is a superconductor. This implies that when a superconductor is put in a magnetic field of intensity B, the magnetic field $B_s$ inside the superconductor will be such that :