Kurukshetra University 2008 B.Tech Electronics and Communications Engineering Physics-1 - Question Paper

BT-l/D08
PHYSICS-I
Maximum Marks : 100
Time : 3 hours

Note: Attempt 5 ques. in all, selecting at lowest 1 questic from every unit.

UNIT-I

1. (a) explain the formation of Newton's rings by reflected light.Explain how these rings can be used to obtain th wavelength of light. [14]

(b) discuss the interference trend formation by Fresnel's bi-prism.

2. (a) Derive expression for the dispersive power and resolving power of a plane transmission diffraction grating. [10]

(b) define construction and working of Nicol prism. [10]

UNIT-II

3. (a) What do you understand by the terms Stimulated absorption. Spontaneous emission and Stimulated emission ?

(b) Draw a neat diagram of He-Ne laser and define the method of its working. [10]

4. (a) Derive an expression for acceptance angle and numerical aperture, in optical fibre.[10]

(b) What do you understand by Single mode ant Multimode fibre ? [5]

UNIT-III

5. (a) State and prove Gauss's legal regulations in electrostatic.How Gauss's legal regulations is applied to obtain the electric fit due to a infinite line charge ? [15]

(b) What do you understand by a Waveguide ? [5]

6.(a) Deduce an expression for energy stored in dielectric in electrostatic field. [10]

(b) describe Electric field intensity, Polarization vector, Electric displacement, and establish relation ranging from them. [10]




UNIT-IV

7. What was the objective of conducting the Michelson - Morley experiment ? define the experiment. How is the negative outcome of the experiment interpreted ? [20]

8. (a) define the principle, construction and working of Nuclear reactor. [10]

(b) Briefly discuss the principle, construction and working of Ionization chamber. [10]

Earning:   Approval pending.