SNS COLLEGE OF ENGINEERING
DEPARTMENT OF S & H (PHYSICS)
SUBJECT CODE & TITLE: PH6151 / ENGINEERING PHYSICS – I
COURSE: B.E., B. Tech.,(ALL BRANCHES)
PART – A
UNIT I – CRYSTAL PHYSICS
Remember
1.
2.
3.
4.
5.
6.
Define interplanar spacing.
Write a note on lattice & Basis.
Draw the structure of diamond.
Define unit cell.
What are Bravais lattices?
Write a note on miller indices.
Understand
7.
8.
9.
10.
Elucidate the difference between primitive and non primitive cell.
Explain atomic packing factor (packing density) and atomic radius.
How will you calculate the co-ordination number for HCP.
List out the various types of melt growth.
11. How crystals are prepared using Bridgmann technique.
12. Name few techniques of crystal growth from melt.
Apply
13. Sketch the planes for (110) (100) (111) (101) (010) (001) (011)
14. Explain how Miller indices are used in crystal structures?
15. Sketch the graphite structure.
16. Explain the various steps involved in czochralski’s technique.
17. The lattice constant for a FCC structure is 4.938 A. Calculate the interplanar spacing for
(220) planes.
18. Draw and explain HCP structure.
Analyze / Evaluate
19. Differentiate lattice parameters and crystal parameters.
20. Compare the packing factor of SC, BCC and FCC.
21. List out the difference between single crystal and poly crystal.
22. Distinguish between crystalline and non crystalline material.
23. Compare the crystal parameters for seven crystal system.
24. A crystal plane cut at 3a, 4b and 2c distances along the crystallographic axes. Find the
Miller Indices of the plane.
25. Which crystal structure is having least co-ordination number? Give an example.
26. Copper has FCC Structure and its lattice parameter is 3.6 Å. Find the Atomic radius.
27. Silver has FCC structure and its atomic radius is 1.414 Å. Find the spacing of (110) plane
and Volume of the unit cell.
PART – B
UNIT I – CRYSTAL PHYSICS
Remember
1. Describe the Bridgman technique of crystal growth.
2. Briefly explain the Chemical Vapour Deposition (CVD) method.
3. Explain the Czochralski method of crystal growth.
4. Describe the various crystal growth techniques.
Understand
5. Explain the physical basis of classifying the crystals into seven systems and 14 Bravais
lattice with neat diagrams.
Apply
6. Draw the structure of SC crystal and describe the details about
i) Lattice point ii) No of atoms per unit cell iii) Atomic radius
iv) Coordination number v) Packing factor
7. Draw the structure of BCC crystal and describe the details about
i) Lattice point ii) No of atoms per unit cell iii) Atomic radius
iv) Coordination number v) Packing factor
8. Draw the structure of FCC crystal and describe the details about
i) Lattice point ii) No of atoms per unit cell iii) Atomic radius
iv) Coordination number v) Packing factor
9. Draw the structure of HCP crystal and describe the details about
i) Lattice point ii) No of atoms per unit cell iii) Atomic radius
iv) Coordination number v) Packing factor
10. Derive an expression for interplanar spacing for (hkl) planes of cubic structures.
11. Sketch the planes for (110) (100) (111) (101) (010) (001) (011)
Analyze / Evaluate
12. Show that atomic packing factor for FCC and HCP are equal.
13. Explain in detail the structures of diamond and graphite.
14. State and explain the relation between lattice constant and density.
15. Explain in detail about miller indices and its procedure with an example.