KNOWLEDGE INSTITUTE OF TECHNOLOGY PART-B
DEPARTMENT OF MECHANICAL ENGINEERING
PH3251-MATERIAL SCIENCE 1. Explain various types of crystal systems and Bravais lattice.
IAT 1 – QUESTION BANK 2. Calculate the number of atoms per unit cell, coordination
number and packing factor for SC, FCC and BCC structures.
PART – A 3. Describe the structure of a HCP crystal. Give details about
its atomic radius, atomic packing factor and axial ratio.
4. Explain crystal defects in a detailed manner
1. Name the seven crystal systems.
5. Define Miller Indices and Write the steps to find them. Give
2. What are Bravais lattices?
an Example.
3. Define packing factor. What is its unit?
6. Define Phase changes and explain its types.
4. What are the differences between crystalline and non-crystalline
7. Explain about Nucleation and growth.
material
8. Starting with the classical free electron theory of metals
5. What are the lattice parameters of an unit cell?
obtain an expression for electrical and thermal conductivity.
6. What is the relation between lattice constant ‘a’ and density ‘ ρ’
9. Define Fermi distribution function and explain the effect of
of the crystal?
temperature on Fermi function.
7. What is meant by loosely packed crystal structure? Give an
10. Explain the meaning of ‘density of states’. Derive an
example of this type of material.
expression for density of states and carrier concentration in
8. What various types of defects.
metals and also find average energy of electrons.
9. What is burger’s vector?
11. Explain energy bands in solids.
10. What is stacking fault?
12. Describe tight binding approximation to explain the
11. Define mobility of electrons.
formation of energy band.
12. What are the drawbacks of classical free electron theory
Derive an expression for the effective mass of an electron
13. Define Fermi distribution function.
moving in energy bands of a solid. Show how it varies with
14. Define Fermi level and Fermi energy with its importance.
the wave vector.
15. What is an effective mass of electron?
13. Derive an expression for the effective mass of an electron
16. On the basis of spin how the materials are classified as para, ferro,
moving in energy bands of a solid. Show how it varies with
antiferro and ferri magnetic.
the wave vector
17. State Curie - Weiss law and its importance.
14. Explain about Diamagnet, Paramagnet and Ferromagnet.
18. What are ferromagnetic materials?
Mention its properties and examples.
19. What is saturation magnetisation
15. Discuss the origin of ferromagnetism and exchange
20. Mention application of GMR.
interaction.
21. What is a semiconductor
Explain paramagnetisum in the conduction electrons in
22. Mention the properties of semiconductors.
metals.
23. Difference between Elemental and Compound Semiconductors.
Discuss quantum interference devices.
24. What is an intrinsic semiconductor
Describe working of magnetic hard disc based on GMR
25. Mention any four advantages of semiconducting materials
sensor
16. Obtain an expression for intrinsic carrier concentration in an
intrinsic semiconductor.
DEPARTMENT OF MECHANICAL ENGINEERING
PH3251-MATERIAL SCIENCE 1. Explain various types of crystal systems and Bravais lattice.
IAT 1 – QUESTION BANK 2. Calculate the number of atoms per unit cell, coordination
number and packing factor for SC, FCC and BCC structures.
PART – A 3. Describe the structure of a HCP crystal. Give details about
its atomic radius, atomic packing factor and axial ratio.
4. Explain crystal defects in a detailed manner
1. Name the seven crystal systems.
5. Define Miller Indices and Write the steps to find them. Give
2. What are Bravais lattices?
an Example.
3. Define packing factor. What is its unit?
6. Define Phase changes and explain its types.
4. What are the differences between crystalline and non-crystalline
7. Explain about Nucleation and growth.
material
8. Starting with the classical free electron theory of metals
5. What are the lattice parameters of an unit cell?
obtain an expression for electrical and thermal conductivity.
6. What is the relation between lattice constant ‘a’ and density ‘ ρ’
9. Define Fermi distribution function and explain the effect of
of the crystal?
temperature on Fermi function.
7. What is meant by loosely packed crystal structure? Give an
10. Explain the meaning of ‘density of states’. Derive an
example of this type of material.
expression for density of states and carrier concentration in
8. What various types of defects.
metals and also find average energy of electrons.
9. What is burger’s vector?
11. Explain energy bands in solids.
10. What is stacking fault?
12. Describe tight binding approximation to explain the
11. Define mobility of electrons.
formation of energy band.
12. What are the drawbacks of classical free electron theory
Derive an expression for the effective mass of an electron
13. Define Fermi distribution function.
moving in energy bands of a solid. Show how it varies with
14. Define Fermi level and Fermi energy with its importance.
the wave vector.
15. What is an effective mass of electron?
13. Derive an expression for the effective mass of an electron
16. On the basis of spin how the materials are classified as para, ferro,
moving in energy bands of a solid. Show how it varies with
antiferro and ferri magnetic.
the wave vector
17. State Curie - Weiss law and its importance.
14. Explain about Diamagnet, Paramagnet and Ferromagnet.
18. What are ferromagnetic materials?
Mention its properties and examples.
19. What is saturation magnetisation
15. Discuss the origin of ferromagnetism and exchange
20. Mention application of GMR.
interaction.
21. What is a semiconductor
Explain paramagnetisum in the conduction electrons in
22. Mention the properties of semiconductors.
metals.
23. Difference between Elemental and Compound Semiconductors.
Discuss quantum interference devices.
24. What is an intrinsic semiconductor
Describe working of magnetic hard disc based on GMR
25. Mention any four advantages of semiconducting materials
sensor
16. Obtain an expression for intrinsic carrier concentration in an
intrinsic semiconductor.
