University of Delhi 2010-1st Year B.Sc PMCS (Physics, Mathematics, Computer Science) Prog PHYSICS UNIVERSITY - Question Paper
This question paper contains 4 printed pages]
Your Roll Nu .
B.Sc. /B.Sc. (Hons.)/I J
PH-101-PHYSICS (NC - Admissions of 2008 and onwards)
Time : 3 Hours Maximum Marks : 75
(Write your Roll No on the top immediately on receipt of this question paper)
Attempt five questions m all including Question No 1, which is compulsory
1 Attempt any five
(a) Show that the length of a rod is invariant under Galilean transformation.
(b) Write postulates of special theory of relativity
(c) What do you mean by the degree of freedom of coupled oscillators 7
(d) What are the necessary conditions for observing interference fringes 9
Why is a NAND gate called a universal gate 9 Draw a circuit diagram to obtain OR gate using NAND gates
(f) What do you mean by nano-pollutants ?
(g) Why is metastable state required to make a LASER 9
(h) What do you understand by GPS 9 5
(a) State and explain the work-energy theorem 2
(b) A particle moves along one quarter of the circumference of a circle of radius 0 5m If the force applied is 0 2 N, inclined at an angle of 60 with the tangent to the circle at the point, calculate the work done
(a) Denve the expression for the relativistic Doppler effect based on the special theory of relativity
(b) Two photons are moving in opposite directions in space Find the relative velocity of one withf respect to other
(a) What do you understand by the phenomenon of beats 7 Explain with an example
(b) Write the differential equation for lightly damped oscillator assuming the damping force is directly proportional to velocity of oscillator Solve the equation and show variation of displacement with time graphically * 3 + 6
Discuss Fraunhoffer diffraction due to a single sht Explain what happens when the slit width is gradually increased and when the screen is gradually moved away from the slit 10
In Fraunhoffer diffraction pattern due to a narrow slit, a screen is placed 2 m away from the slit to obtain the pattern. If wavelength of light is 5000 A, find the width of the slit when the first minimum he
5 (a) (b)
6 (a) (b)
7 (a) (b)
5 mm on either side of the central maximum 5
Explain the working of a half-adder circuit Give its truth table 5
How can an Op-amp be used as a comparator ? Explain its working. 10
Derive Poiseullies formula for the volume rate of flow of liquid through a tube of circular cross-section
10
If two capillary tubes of length /t and l2 and
radii and r2 are joined in series show that
volume rate of flow V of liquid through the combination is given by
-1
! !i 4+ 4
r. r2
7tP
8t)
V =
|
(P = pressure combinations and viscosity) |
difference across ti = coefficient of |
(a) Lissajous Figures
(b) Light emitting diode and its applications
(c) Importance of Nanoparticles
(d) Youngs double slit experiment
%
|
Attachment: |
| Earning: Approval pending. |
