Calicut University 2006 B.E Computer Science Engineering Physics (A) - Question Paper

COMBINED 1st AND 2nd SEMESTER B.TECH. (ENGINEERING)
DEGREE EXAMINATION, JUNE 2006

EN 04 – 103 A - ENGINEERING PHYSICS (A)

(For AI, CS, EE, EC, IT, IC, BM, BT, PT)
[2004 admissions]

Time : 3 Hours Maximum : 100 Marks

ans all ques..

part A

I. 1. discuss AC and DC Josephson’s effect.
2. provide any 5 applications of superconductors.
3. discuss the phenomenon of interference of light. elaborate the necessary conditions to get clear and distinct interference fringes?
4. discuss the resolving power of the plane diffraction grating.
5. elaborate the difference ranging from positive and negative crystals?
6. provide the construction and theory of half wave plate.
7. Derive the Planck’s legal regulations of radiation in terms of wavelength.
8. A proton is confined to a nucleus of radius five X 10-5 m. compute the minimum uncertainty in its momentum. Also compute the minimum kinetic energy of the proton.
(8 X five = 40 marks)

part B

II. (i). (a) Write short notes on :
(i)Elemental and compound semiconductors. (5 marks)
(ii) Intrinsic and extrinsic semiconductors. (5 marks)
(b) discuss the working of the Zener diode as a voltage regulator. (5 marks)

Or

(ii). (a) Write short notes on :
(i) Solar cell. (4 marks)
(ii) Phototransistor. (4 marks)
(iii) Photoresistor. (4 marks)
(b) compute the critical current which can flow through a long thin superconducting wire of aluminium od diameter 10-3 m. The critical magnetic field for aluminium is 7.9 X 103 A/m. (3 marks)

III. (iii). (a) Determine the wavelength of a monochromatic light and the resolution of spectral lines using Michelson’s interferometer. (13 marks)

(b) Fringes of equal inclination are observed in a Michelson’s interferometer, as 1 of the mirror is moved back by one mm., 3663 fringes moves out from the center of the trend. compute the wavelength. (2 marks)

Or

(ii). (a) State Rayleigh’s criteria for the resolution of spectral lines. Distinguish ranging from the resolving power and dispersive power of the diffraction grating. (12 marks)

(b) A parallel beam of monochromatic light is allowed to be incident normally on a plane grating having 1250 lines/cm and a 2nd order spectral line is observed to be deviated through 300. compute the wavelength of the spectral line. (3 marks)

IV. (i). (a) Outline the principle of half shade polarimeter and discuss how you will determine the specific rotation of a substance. (13 marks)

(b) Determine the specific rotation of the provided sample of sugar solution if the plane of polarization is turned through 13.20. The length of the tube containing 10% sugar solution is 20 cm. (2 marks)

Or

(ii). (a) discuss how circularly polarized and elliptically polarized light are produced and detected. (13 marks)

(b) compute the thickness of a half-wave plate of quartz for a wavelength of 5000 A. Here µe = 1.553 and µ0 = 1.544. (2 marks)

V. (i). (a) discuss briefly the distribution of energy in a blackbody spectrum. (6 marks)
(b) What is Wien’s Displacement law? discuss the Wien’s legal regulations of energy distribution. (9 marks)

Or

(ii). (a) Derive the time independent Schrodinger wave formula. (10 marks)
(b) What is meant by expectation value in quantum mechanics? (5 marks)
(4 X 15 = 60 marks)

Earning:   Approval pending.