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(Pages : 4)

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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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-2-

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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.

:r l.T

.,.. _'t "_

6Lo'

qd

-I

T)

" .+

':e._.

**

.

' zVx

g

3LO'

I

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a

-J-

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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

6046

-4-

Iffiffiiltflilltililtililflil

.

,/

,...

,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.

&

$t9'

"h="

+-^L

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 .