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Reg. No. : ....................................
Name 3 .........................................
Third Semester B.Tech. Degree Examination, October/lr{ovember 2011 (2008 Scheme) 08.303 : NETWORK ANALYSIS (TA)
Max. Marks : 100
Time : 3 Hours PART _ A Answer all questions 1
(10x4=40 Marks)
:
. Find the Thevenin's equivalent cirquit of the following network's left to terminal A-B.
5=&
l0
i+n Zy
Loo
2. Verify initial and final value theorem for f(t) = 2+ e-3t Cos 2t. 3. Determine current
I in the following network.
,t
4. Plot the following functions
i) 5r(t-3) iii) (t - 4) [u(t -
:
ii) 7u (t +3) 1)
- u(t - 4)]
P.T.O.
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5. Find the voltage transfer function of the following network.
r
T.
V
vz_
I
.-i...fr,,.-J
6. Draw the polar plot of first order Rc low
pass circuit.
7. Give the Root locus of poles of RLC series network. 8. A series RLC circuit has R =25C), L = 0.04H, C = 0.0lpF. Calculate resonant {r"9Utre1g*Q-facror and hg]!-power:frequeScies,
9. Define propagation constant and characteristic
,
r
impedance.
.,
.
10' Explain the significance of frequency transformation in analogue filter design. PART _ B Answer any two questions from each Module. Each question carries L0 marks.
Module 1
I . Determine
I,
and -
I, using mesh analysis.
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T)
" .+
':e._.
**
.
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g
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I
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12. In the following circuit, switch S is in position I for a long time and moved to position 2 at t = 0. Find the expression for voltage aiross capacitor V.(t)
fort>0.
lJz-
U"Lt, -Lff 713TFind the Laplace transform of the following waveforms.
J
b)
a)
-[
-L
Module
- II
14. a) What are the necessary conditions'{gg,,,4 network function to be driving ti
point function
?
b) Find the transfer impedance function of the network shown below.
II
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.
,/
,...
,rfi. The output voltage V(s) of a network is given by 'V1s.;
4s
(s+2)(s2
+Zs+2)'
Plot its pole- zero diagram and obtain the time domain response V(t) from
pole-zero plot. I
6. obtain the Z-parameters of the following network.
Module
- III
Obtain Thevenin's equivalent circuit at terminal 'ab' for the coupled circuit shown below.
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18. a) Show that in a series RLC circuit fr.f, _ ff , where frequencies'and' "fi is'the resonant frequency.
ft, fH are half-power
b) Measurement on a practical inductor at 10 MHz give L - g pr H and 40' Find the ideal capacitance value C for plrallel resonance at -Qtrq , 10 MHz and calculate coffesponding bandwidth. l)zDetetmine the order of Butterworth
,/
and Chebyshev
specifications.
0** = 0.1 dB ,
umin = 60 dB
Wc = 250radl sec
W
filter to satisfy the following
= 2000 rad / sec .