Jawaharlal Nehru Technological University Hyderabad 2003 B.Tech Production Engineering I Supplementary s, ember- ENGINEERING PHYSICS -university question paper

Code No.NR-10153
I B.Tech. Supplementary Examinations, November-2003

ENGINEERING PHYSICS
(Common to Civil Engineering, Mechanical Engineering, Aeronautical Engineering, Chemical Engineering, Production Engineering, Mechatronics Metallurgy and Material Technology)
Time: three hours Max.Marks: 80
ans any 5 ques.
All ques. carry equal marks
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1.a) What is simple harmonic motion? discuss.
b) Write the theory of forced vibrations, and find the condition for amplitude resonance.
c) A body oscillates with simple harmonic motion according to the equation,
x = eight cos [3?t+(?/3)] metres. What is (i) the displacement (ii) the velocity
(iii) the acceleration at the time t = two sec.

2.a) Describe the experimental procedure to obtain the radius of curvature of a
plano-convex lens by forming Newton’s rings.
b) Explain different methods to produce plane polarized light.

3.a) Describe in detail and discuss spontaneous and stimulated emission of light.
b) Describe and discuss the working of a Ruby laser.
c) Describe a method of determining the numerical aperture of an optical fiber.

4.a) Derive Bragg’s legal regulations for X-ray diffraction in crystals.
b) When a beam of X-rays of wavelength 1.8 A.U., is incident on a crystal surface, the 2nd order maximum is found at a glancing angle of 15o. compute the corresponding inter-planar spacing.
c) Sketch the planes with Miller indices (123) and (221) in the case of a simple cubic crystal.

5.a) Discuss with suitable mathematical expressions, the Kronig Penney model for the energies of an electron in a metal.
b) Discuss the effect of a magnetic field on a super-conductor.

6.a) Explain the origin of spontaneous magnetization in ferro-magnets on the basis of spin-spin interaction. discuss magnetization curve on the basis of domain movement.
b) Determine the electric field intensity E in a material for which the electric susceptibility is 3.5 and the electric polarization is 2.3 ? 107 c/sq.m.
7.a) Explain in detail, the terms (i) dielectric constant (ii) dielectric loss and
(iii) dielectric strength.
b) Distinguish ranging from Ferro-electrics and Piezo-electrics.

8. Write short notes on any 3 of the following:
(a) Colours of thin films
(b) Brewster’s legal regulations
(c) Hall effect
(d) Drude-Lorenz theory of electrical conduction
(e) Seebeck effect and Peltier effect.

Earning:   Approval pending.