Download DBATU (Dr. Babasaheb Ambedkar Technological University) B.Tech First Year 2019 Mid Semester PHY1202 Engineering Physics Question Paper
Mid Semester Examination ? October 2019
Course: B. Tech in Civil/Mechanical Sem.: I
Subject Name: Engineering Physics Subject Code: PHY1202
Max Marks: 20 Date: 04/10/2019 Duration:? 1 Hr.
Instructions to the Students:
1. Illustrate your answers with neat sketches, diagrams etc. wherever necessary.
2. Use of non-programmable calculator is allowed.
3. If some part or parameter is noticed to be missing, you may appropriately assume it.
(Level/CO) Marks
Q. 1 Attempt following Questions 6
1. If the damping is smaller then the resonance will be, _ CO-l
a) ?atter b) sharper c) none of these d) both a and b
2. Length of Nickel rod needed to produced ultrasonic wave of frequency 40 CO-l
KHz is, (Given: Density = 9.99 Kg/m3, Y= 8 X 1010 N/mz).
a) 1.2 cm b) 1.58 m
c) 1.1 m d) 1.4 cm
3. Depth of sea calculated by using formula, CO-l
a) D = % b) D = %
c) D = % d) D = "?3??F
4. In doubly refracting crystal along optical axis CO-l
a)uo>ue b)uo=ue C)uo
a) N e b) He c) Cr d) All of these
6. The diameter of the nth dark Newton?s ring is given by formula, CO-l
a) Dn2 = (2n+1))\R b) Dn2 = (3n+1))\R 0) Dn2 = 2nAR d) Dnz = 4111?
Q2 Solve Any Two of the following. 3 X 2
(A) State Piezoelectric, Inverse Piezoelectric and Magnetostriction effect. CO-l
(B) Explain spontaneous and stimulated emission of radiation. CO-l
(C) Describe the structure of optical ?ber. CO-l
Q. 3 Solve Any One of the following. 8
(A) Explain Piezo electric effect for the production of ultrasonic wave. CO-l
(B) Explain Ruby laser with neat labeled diagram. CO-l
*v'nk End *4?:
This post was last modified on 17 May 2020