engineering physics 40 questions



1. B-TECH 
ENGINEERING PHYSICS (QUSTION BANK)

UNIT-1
1.      DEFINE COHESSIVE ENERGY OF A MOLECULE AND CALCULATE COHESSIVE ENERGY OF A DIATOMIC MOLECULE?
2.      (A) Define unit cell, space lattice, lattice parameters and basis?
(b) Discuss about diamond structure?
3.      Discuss about seven crystal systems and their corresponding bravias lattice with the help of neat diagram?
4.      (a) State and explain Bragg’s law?
(b) Explain salient features of miller indices?
(c) Consider a plane whose intercepts are 4a, 2b, 2c along the axis x, y, z. calculate its miller indices
5.      What is interplaner spacing? Derive an expression for the inter planner spacing In the case of cubic structure?
6.      Show that fcc more closely packed structure than other two structures           (sc, bcc)?
7.      Explain various types of bonding in solids with suitable examples?
8.      (a) Write a short note about point defects? Estimate the number of schottly and frankel defects at a given temperature?
(b) Write notes on edge dislocation and screw dislocation and explain the significance burger vector?
UNIT-2
9.      A) Discuss about the properties of matter waves?
(b) Calculate wave length associated with a proton of energy 1 MeV ?
10.  (a) Derive Schrödinger time independent equation?
(b) Explain about physics significance of wave function?
11.  Discuss about M-B, B-E and F-D statistics?
12.  Explain motion of an e in a periodic potential and also explain how kronig penny model is helpful in classification of materials?
13.   Define and derive an expression for effective mass of an electron?
14.  Define density of states? Derive an expression for same?
15.  Show that energies if a particle in a potential box are quantized (Particle in a box) ?
16.  Explain in details the Davison and germer experiment to prove The existence of matter waves ?
Unit- 3
17.  Discuss about piezo electricity and Ferro electricity?
18.  Derive an expression for e and ionic polarization?
19.  Explain domain theory of ferro magnetism on the basis of hysteresis curve?
20.  (a)  Discuss about super conductivity phenomena?
(b)  Explain about messiner effect in super conductors?
21.  (a)  Define electric dipole, dipole moment, displacement vector and electric susceptibility, polarizability?                                       (b) Estimate internal fields in a dielectric material?
22.  (a) Explain classius-mosotti relation in dielectrics subjected to static fields?                                                                                           (b) Write about Bohr magneton ?
23.  Classification of dia, para and ferro magnetic materials on the basis of magnetic moment?
24.  (a) Write applications of super conductivity? 
(b) Describe the difference between type-1 and type-2 super conductors and also explain soft and hard magnetic materials?
                                                            
Unit-4
25.  a) Explain do the construction of an optical fiber
b) Define and derive an expression for numerical aperture of an optical fiber
26.   Discuss about the characteristics of a laser beam
27.   Describe construction, working and applications of ruby laser
28.   Describe construction, working and applications of He-Ne laser
29.   a) Explain the concept of double refraction and total internal reflection
 b) Discuss about population inversion in lasers
30.   a) Explain the phenomena of absorption, spontaneous emission and simulated emission.
b) Establish relation between Einstein co-efficient
 c) Discuss about the applications of laser’s
31.   a) Explain construction and working of  a Nicol’s prism
 b) Explain and construction of Newton’s ring’s experiment
32.   a) explain diffraction grating experiment
 b) Explain and working of semi conductor devise
UNIT-5

33.  Discuss about basic requirements of an acoustically good hall?
34.  Discuss about a method for the measurement of absorption co-efficient of a material?
35.  Explain quantum confinement in nano materials?
36.  Describe synthesis of nano material by bottom up technique?
37.  Discuss about the factors effecting artificial accounts and suggest the remedies to overcome those problems?
38.  Obtain an expression for the carrier concentration in n-type semiconductor and also find the position of Fermi level in p-type semiconductor
39.  Obtain an expression for the carrier concentration in p-type semiconductor and also find the position of Fermi level in p-type semiconductor
40.  a) Define hall effect and explain it & it’s importance
b) Explain characterization by TEM.

Popular posts from this blog

Physics (Physical Science)X class (Telangana-SSC)and Lesson wise important (expected) questions, Diagram based questions

Lesson 1. Reflection  of light at curved surfaces 1.  Write any two uses of spherical mirrors. 2.   Write any two uses of convex mirror in day today life. 3.  What happens if concave mirror is used as a rear view mirror? 4.   Why are convex   mirror is used as a rear view mirror? 5.   Which property of concave mirror is used in making the solar cooker? 6.  Your friend   noted the measurement of object distance and image distance in an experiment with a concave mirror and made a conclusion. What would be his conclusion? 7.    Which property of concave mirror helps the dentists to check the dental problems? 8.  What are the characteristics of image formed when an object is placed between F and C ? 9.   When do you get image at infinity with the concave mirror? 10.  State the difference between virtual image and real image. 11.  Does focal length of spherical mirror changes when it is complete...
Read more