Magnetic Materials: Important Part B Questions

Applied Physics CSIE II

UNIT I: Magnetic Materials

ANNA UNIVERSITY PART 'B' QUESTIONS

1. Describe the structure of ferrites. How the magnetic moment of ferrite molecule is calculated?

2. (ii) What is the energy loss/per cycle?

(ii) What are ferrities?

3. Distinguish between Ferro, anti‒Ferro and Ferri magnetic materials.

4. (i) Distinguish between soft and hard magnetic materials.

(ii) Give an account of structure, properties and applications of ferrites.

5. What are ferrites? Describe the different types of ferrites structure with suitable diagrams. What are the applications of ferrites?

6. Write short notes on Dia, Para and Ferromagnetic materials.

7. How hysteresis curve is explained on the basis of domain theory for a ferromagnetic material?

ADDITIONAL PART 'B' QUESTIONS

1. (i) Explain the dia, para and ferro magnetic materials on the basis of spin.

(ii) Discuss the properties and effect of external field on the para and ferro‒ magnetic materials.

2. (i) What is meant by ferrimagnetism?

(ii) Describe the structure formation of ferrites and the interaction of molecules in it.

(iii) Write down the applications of ferrites.

3. (i) What is meant by Hysterisis loss?

(ii) Describe the formation of Hysterisis loop using domain wall movement.

(iii) Classify the magnetic materials as hard and soft on the basis of Hysterisis loop.

4. (i) What is meant by magnetic material?

(ii) What are the parameters used for the application of magnetic materials.

(iii) Write short notes on magnetic recording materials and discuss any one in detail.

5. What is meant by magnetic bubble memory system? Describe the construction and working of magnetic bubble memory.

6. Describe the writing and reading of data in magnetic hard disk using GMR sensors.

7. Write short notes on

(i) Magnetic HDD Disks

(ii) Magnetic bubble memories.