Question 1:
a) What is meant by the term polarization of a solid? Describe polarizability of atoms and molecules.
b) Derive expressions for electric and ionic polarizability of a dielectric material.
Question 2:
a) Describe the behavior of a dielectric material in an ac field.
b) Derive expression for the energy absorbed per second in a dielectric material when an ac field is applied.
Question 3:
a) What are various kinds of point defects? Describe each of them.
b) Derive expression for the concentration of valancies in metallic and ionic crystals.
Question 4:
a) Describe the role of dislocations in the crystal growth of a solid.
b) What is meant by the term magnetic susceptibility? Explain experiments set up to measure the magnetic susceptibility of the material.
Question 5:
a) Differentiate between classical and quantum theory of Para magnetism.
b) Describe the quantum theory of Para magnetism. Obtain curies law for the paramagnetic material.
Question 6:
a) Describe the Weiss theory of ferromagnetism. Obtain an expression for the susceptibility of ferromagnetic material.
b) Describe how a saturation magnetization based on temperature.
Question 7:
a) Derive quantization condition of spin waves.
b) Obtain block T3/2 law. Describe its validity.
Question 8:
a) What do you mean by ferromagnetic material? Describe the structure of a ferrite material.
b) Describe Neer’s theory of ferromagnetic material.
Question 9: Write note on any two of the given:
a) Effect of crystal field on the paramagnetic properties of solid.
b) Determination of dielectric of a solid.
c) GMR and CMR materials.
d) Ferromagnetic domains.