B &1103

Reg No.: Name: हि. ட ட ப்பட்‌ ‏ےت‎
‎APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY.»
FIRST/SECOND SEMESTER B.TECH DEGREE EXAMINATION, MAY 2019
Course Code: PH100
Course Name: ENGINEERING PHYSICS

Max. Marks: 100 Duration: 3 Hours
PART A ⋅
Answer all questions, each carries 2 marks. Marks
1 What is the effect of damping on the frequency and time period of an (2)
oscillator?
2 Distinguish between transverse and longitudinal waves. (2)
3 What are coherent sources? (2)
न 4 What is grating element? Write the grating equation in terms of grating (2)
` element.
5 What is Kerr effect? (2)
6 Give two examples each for Type-I and Type-II super conductors. (2)
7 What is tunnel effect? (2)
8 How the symmetry of wavefunction of a system of particles is related to (2)
the statistics obeyed?
9 What is the difference between echo and reverberation? (2)
— TO ————What is magnetostricrtoreretr write one application. The
11 What are the advantages of semiconductor laser? (2)
12 What is photovoltaic effect? (2)
3 PART B
Answer any 10 questions, each carries 4 marks.
13 Explain the phenomenon of amplitude resonance and obtain the value of (4)

resonant frequency.

14 A wave is represented by ¥=3x10%cos(8.4 x 1013 t+2.8 x 105Z)Vm 7. (4)
Find the amplitude, frequency, wavelength, and wave velocity where z in
metre and t in second.

15 How an interference filter is constructed? Write its working. (4)

16 In fraunhofer’s diffraction due to a single slit a screen is placed 2m away (4)
from the lens to obtain a pattern. If the slit width is 0.2mm and the first
minima lies 5mm on either side of central maxima, find the wavelength of
light.

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