Magnetic Properties of Materials

When Superconductors, are heated above the critical temperature, they expel magnetic field and do not allow the magnetic field to penetrate inside them. 

Explain meissner Effect

Meissner effect is strictly followed by

What is the Meissner effect?

The hysteresis loss in soft magnetic materials must be kept ______

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

The materials suitable for making electromagnets should have

In the hysteresis cycle, the value of $H$ needed to make the intensity of magnetization zero is called

Explain origin of diamagnetism on the basis of its atomic structure.

Discuss the classification of materials based on their behaviour in magnetic field.

What is Curie temperature? What happens above Curie temperature?

Explain ferromagnetism on the basis of domain theory.

Distinguish between diamagnetic and paramagnetic substances.

Magnetic susceptibility for a paramagnetic material is $0.60$ at $120 \mathrm{K}$. Find its magnetic susceptibility at ${27}^o \mathrm{C}$.

The curie temperature of ferromagnetic materials is $300 \mathrm{K}$. If the magnetic susceptibility at $450 \mathrm{K}$ is $0.6$. Find curie constant for it.

A sample of ferromagnetic material of mass $0.6 \mathrm{Kg}$ and density $7.8\times {10}^{3 }\mathrm{Kg}/{\mathrm{m}}^3$  is placed in an alternating magnetic field of frequency $50 \mathrm{Hz}$. If the area of hysteresis loop is $0.722 {\mathrm{m}}^2$. Find the hysteresis loss per second.

What is curie temperature? Explain how the magnetic susceptibility of paramagnetic, diamagnetic and ferromagnetic substance depend on temperature? Also write law regarding it.

What are uses of hysteresis curve?

How you will identify rods of paramagnetic and diamagnetic substance?

What is retentivity or remanence?