Download GTU BE/B.Tech 2019 Summer 1st Sem And 2nd Sem Old 110011 Physics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 1st Sem And 2nd Sem Old 110011 Physics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?I &II (OLD) EXAMINATION ? SUMMER-2019
Subject Code: 110011 Date: 03/06/2019

Subject Name: Physics

Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt any five questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Describe the principle and the method of producing of ultrasonic waves by
magnetostriction method.
07
(b) State any five factors affecting the acoustics of the building and give at least two
remedies for each.
07

Q.2 (a) (i)What is Zener diode? Explain with circuit diagram how a Zener diode operates
in reverse bias condition.
04
(ii) Classify solid on the basis of energy band diagram. 03
(b) Define Miller indices. Obtain an expression for interplanar distance between two
adjacent planes of Miller indices (h k l) in a cubic crystal system.
07

Q.3 (a) Describe the construction of fiber optic cable and compare the advantage of fiber
optic cable over metallic cable.
07
(b) (i) Give few important applications of superconductors. 04
(ii)A hall has a volume of 1,20,000 m
3
. It has a reverberation time of 1.5 seconds.
What is the average absorbing power of the surface if the total absorbing surface
area is 25,000 m
2
?
03

Q.4 (a) Deduce expression for electrical conductivity of conducting material and hence
obtain Wiedemann-Franz law.
07
(b) Define superconducting material? List the properties of superconducting
materials and explain in detail.
07

Q.5 (a) What is Shape Memory Alloys (SMA)? Explain the temperature induced and
stress induced transformations in detail.
07
(b) (i) List out the difference between step and graded index fibre. 04
(ii) Draw the planes (100), (111) (011). 03

Q.6 (a) List the various methods of Non Destructive testing and explain any one of them
in details.
07
(b) (i) Explain the Hall effect. 04
(ii)Refractive index of core and cladding material are 1.623 and 1.599
respectively. Find out critical angle of a fiber.
03

Q.7 (a) Describe the construction and working of Nd-YAG laser with a suitable energy
level diagram.
07
(b) (i) Describe any four applications of Laser. 04
(ii) Find the relaxation time of conduction electrons in a metal having resistivity
1.54 x 10
-8
?.m and electron density 6.8x 1028 per m
3
.
03

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