Part B - 16 Marks Questions

QUESTIONS

Part B '16' Marks Questions

1. (i) Describe the different types of polarization.

(ii) Obtain an expression for electronic and ionic polarization in dielectrics. (AU May 2009)

2. Discuss the different types of polarization mechanism and polarizability involved in dielectric materials. (AU Dec 2009)

3. Starting with the internal field expression, Derive Clausis - Mosotti equation. (AU Nov/Dec 2013)

4. (i) What is meant by internal field?

 (ii) Obtain expression for internal field using Lorentz method. (AU Nov/Dec 2012)

(iii) The dielectric constant of water is 80. Is water a good dielectric? Is it useful for energy storage in capacitors? Justify your answer. (AU April/May 2011)

5. (i) Deduce Clausius-Mosotti equation and explain its use in predicting the dielectric constant of solids.

(ii) Discuss the different types of polarization mechanism and polarizability involved in a dielectric material. (AU July 2009)

6. Starting with the internal field in a dielectric, obtain Clausius-Mossotti equation. (AU May 2009)

7. (i) Give a detailed discussion on the various types of dielectric breakdown in dielectric materials.

(ii) What are the remedies to avoid breakdown mechanism?  (AU July 2009)

 8. Define thermal breakdown of dielectrics and explain its characteristics.

9. Define and explain the different polarization mechanisms in dielectrics, with necessary polarizability expressions. (AU Nov/Dec 2011)

10. Define 'internal field'. Obtain the expression for internal field using Lorentz method and hence deduce the Clausius-Mosotti equation. (AU May/June 2012)

11. Explain electronic polarization in atoms and obtain an eno expression for electronic polarisability in terms of the radius of atoms. (AU Nov/Dec 2012)

12. (i) Explain the term internal field in solids. Derive an mods ns expression or the Lorentz field for elemental dielectrics.

 (ii) Obtain Clausius-Mosotti equation for elemental solid dielectrics. (AU Oct 2009)

13. Define dielectric breakdown. Explain five types of dielectric breakdown the occur in dielectric materials. (AU May/June 2013)

14. Define electric and ionic polarization and explain them with a neat diagram.

 (AU May/June 2013)

15. Define the following:

(i) Dielectric constant ε_r

(ii) Polarizability α

(iii) Polarization 

(iv) Electric flux density D

(v) Electric susceptibility X

Give also the necessary equation relating the above quantities.(AU May/June 2012)