Paramagnets Vs Ferromagnets

Q.

What happens when a Paramagnetic material is heated above Curie temperature?

Q. Which transition occurs at Curie's temperature?

1. Ferromagnetic becomes diamagnetic
2. Paramagnetic becomes diamagnetic
3. Diamagnetic becomes paramagnetic
4. Ferromagnetic becomes paramagnetic

Q. Which among the following magnetic materials align themselves in the direction parallel to the field when suspended in uniform external magnetic field?

1. Ferromagnetic materials
2. Diamagnetic materials
3. Antiferromagnetic materials
4. Paramagnetic materials

Q.

What happens when Ferrimagnetic (${\mathrm{Fe}}_3{\mathrm{O}}_4$) is heated at 850K?

Q. Curie temperature is the temperature above which:

1. paramagnetic material becomes ferromagnetic material
2. ferromagnetic material becomes diamagnetic material
3. paramagnetic material becomes diamagnetic material
4. ferromagnetic material becomes paramagnetic material

Q. The curie temperature is that at which :

1. Semi-conductor becomes conductors
2. Ferromagnetic becomes paramagnetic
3. Paramagnetic becomes diamagnetic
4. Metals become super conductor

Q. Which relation is true for curie law?

1. $M=\frac{C.B}{T}$
2. $M=\frac{C.T}{B}$
3. $M=B.C$
4. $M=\frac{T}{B.C}$

Q. At what temperature will the RMS velocity of $S{O}_2$ be the same as that of $O_2$ at 303 K?

1. $404K$
2. $300K$
3. $606K$
4. $850K$

Q.

A sensitive magnetic instrument can be shielded very effectively from outside magnetic fields by placing it inside a box of:

1. wood
2. plastic
3. metal of high conductivity
4. soft iron of high permeability

Q.

what is the meaning of " ferromagnetic "?

Q. The temperature at which the domain structure gets destroyed and ferromagnetic substance is converted into paramagnetic substance is called as ___________.

1. Domain
2. Rowland
3. Curie Temperature
4. Magnetic Field Intensity

Q. Iron loses magnetic property at:

1. melting point
2. $1000K$
3. curie point
4. boiling point

Q. Above Curie temperature, ferromagnetic substances become _________.

1. diamagnetic
2. paramagnetic
3. ferrimagnetic
4. none of these

Q. Identify the elements which are not ferromagnetic.

1. Nickel
2. Bismuth
3. Cobalt
4. Sodium
5. Potassium
6. Lithium
7. Oxygen
8. Iron

Q. Which transition occurs at Curie's temperature?

1. Ferromagnetic becomes diamagnetic
2. Paramagnetic becomes diamagnetic
3. Ferromagnetic becomes paramagnetic
4. Diamagnetic becomes paramagnetic