B 00PHT1IU 902B
RegNo-:
APJ ABDT]L KALAM TECHNOLOGICAL I]NIVERSITY
Second Semester B.Tech Degree Examination July 2021 (2019
.\i$ix=r---t#"/-)
Course Code: PHT110
Course Name: ENGINEERING PHYSICS B
(2019 Scheme)
Max. Marks: 100 Duration: 3 Hours
PART A
e. Answer all questions, eoch corries 3 marks. Marks
I Mention three cases of damping. Draw their displacement (3)
-time graphs.
2 Write the three dimensional wave equation and its solution. (3)
a
J Explain, with the help of the relevant equation, why the centre of a (3)
Newton's rings system appears dark in reflected light.
4 Define dispersive power of grating. Write its expression. (3)
) what is quantum mechanical tunnelling? Name two electronic devices based (3)
on this phenomena.
6 Mention any.three applications of nanotechnology. (3)
7 Differentiate between musical sound and noise. (3)
8 Write a note on non destructive testing. Give an example for non destructive (3)
testing method.
9 emission.
Differentiate between spontaneous emission and stimulated (3)
l0 Draw the block diagram of fibre optic communication system. (3)
' PART B
Answer onefuti questionfrom each module, each question carries 14 marks
Module-I
ll a) Derive the differential equation of a forced harmonic oscillator and obtain the (10)
expression for its amplitude.
b) The amplitude of an underdamped oscillator reduc,Ls to (l/10)th of its initial (4)
value after 100 oscillations. Its time period is 1.15s. Calculate the damping
constant and relaxation time.
12 a) Derive the expression for velocity of transverse wbves in a uniform stretched (10)
string.
b) A travelling wave propagates according to the expression 5 0.003sin(3x-2t) (4)
Page I of3
Downloaded from Ktunotes.in
RegNo-:
APJ ABDT]L KALAM TECHNOLOGICAL I]NIVERSITY
Second Semester B.Tech Degree Examination July 2021 (2019
.\i$ix=r---t#"/-)
Course Code: PHT110
Course Name: ENGINEERING PHYSICS B
(2019 Scheme)
Max. Marks: 100 Duration: 3 Hours
PART A
e. Answer all questions, eoch corries 3 marks. Marks
I Mention three cases of damping. Draw their displacement (3)
-time graphs.
2 Write the three dimensional wave equation and its solution. (3)
a
J Explain, with the help of the relevant equation, why the centre of a (3)
Newton's rings system appears dark in reflected light.
4 Define dispersive power of grating. Write its expression. (3)
) what is quantum mechanical tunnelling? Name two electronic devices based (3)
on this phenomena.
6 Mention any.three applications of nanotechnology. (3)
7 Differentiate between musical sound and noise. (3)
8 Write a note on non destructive testing. Give an example for non destructive (3)
testing method.
9 emission.
Differentiate between spontaneous emission and stimulated (3)
l0 Draw the block diagram of fibre optic communication system. (3)
' PART B
Answer onefuti questionfrom each module, each question carries 14 marks
Module-I
ll a) Derive the differential equation of a forced harmonic oscillator and obtain the (10)
expression for its amplitude.
b) The amplitude of an underdamped oscillator reduc,Ls to (l/10)th of its initial (4)
value after 100 oscillations. Its time period is 1.15s. Calculate the damping
constant and relaxation time.
12 a) Derive the expression for velocity of transverse wbves in a uniform stretched (10)
string.
b) A travelling wave propagates according to the expression 5 0.003sin(3x-2t) (4)
Page I of3
Downloaded from Ktunotes.in
