If a ferromagnetic material is inserted in a current-carrying solenoid,the magnetic field of the solenoid

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature,then it will show

The magnetic susceptibility of a paramagnetic substance at $-173^{\circ} C$ is $1.5 \times 10^{-2}$. To have the susceptibility $0.5 \times 10^{-2}$,the change in temperature in ${ }^{\circ} C$ is

In a ferromagnetic material,below the Curie temperature,a domain is defined as:

The magnetic susceptibility of a paramagnetic material is $1.0 \times 10^{-5}$ at $27^{\circ} C$ temperature. Then at what temperature its magnetic susceptibility would be $1.5 \times 10^{-5}$ (in $^{\circ} C$)?

The materials suitable for making electromagnets should have