RTU 2016 Question Paper Semester IV Electrical Engineering Circuit Analysis II

*'tit 13,','
RollNo. Total No of Pages: fl
N 4E4172
f-
t-,{ B.Tech. IV-Sem (Main & Back) Examl June-July 2016
+
frl
Electrical Engineering
$ 4E,E2A Circuit Analysis-Il

Time: 3 Hours Maximum Marks: 80
Min. Passing Marks (Main & Back): 26
Min. Passing Marks (OId Back): 24
Instructions to Candidates :-

Attempt any ftve questions, selecting onte questi.on from each unit. All
Questions carry equal marks. Schematic diagrams must be shown
wherever necessary. Ary data you feet missing suitably be assumed and
stated clearly.
Units of quantities used./ calculated must be stated cleatrly.
Use of following supporting material is permitted during examination.

(M entioned in form No.205 )

I. NIL 2. NIL

UNIT.I
Q.1 (a) Explain the Concept of Complex frequency. t6t

(b) Obtain p
I (s)anA bP
V (s)
for the Network shown in fig.l t10l

Fig.-l
[484772] Page I of7 ltoT4ol

OR

of Network shown in
Q.l (a) Determine the condition under which the input impedance
t81
fig.2 willbe equal to R

(b) Find the Transform Impedance Z(s) and admittance Y(s) of the one port network
t8l
shown in fig.3

R2

L

Page2 ofl [10740]
1484L721

Q.2 (a) Write down necessary Condition for Transfer function and also find Transfer
Vr(s)
function 7a{s) - -:-
I, (s)
of the Network given in fig.4 t8l

IISC

/, (s)
I
Fig .- 4

(b) For Network shown in fig.5. Compute t8l

(i) Grr(s)=+3
I

I^ (s)
(ii) C[zr (s) I1 (s)

t 2H

Fig.-5

l4B4t72l Page 3 of7 l1o74ol

OR

for its driving point admittance pole zero diagram as'
Q.2 (a) A series RLC circuit has
t8l
shown in fig.6 find the value of R'L'C

Scale

factee5

Fig.-6

(b) If Laplace transform of a voltage V (t) is
4 (s +l)
v ($=
G+rx!+3)
Determine V(t) t8l
Draw pole'zero of this function and

UNIT.III
so that P(s) = Sa+ 53+ 4S2+ 25
+ 3 is Hurwitz' t6l
e.3 (a) Find ttre range of values of a
the
(b)Writedownthepropertyofpositiverealfunctionanddeterminewhether
:.
function is

z(s)=#* is P' r' or not t10l

Page 4 of.l fLoT4ol
14841721

Q.3 (a) An Impedance function is given by
(s +1Xs + 4)
Ltor--
s(s+2)(s+5)

Find R - C representation of Cauer - I and Cauer - II forms. t8l

(b) Synthesize the Impedance Z1r;=5€JlXt2 In Foster - I and Foster - II
S(s2 +4)

, _r30
forms if Z(-2\ t8l
I
t6
I

I

I

t
I

I

Q.4 (a) Fr;ordz- parameters for the Network shown infrg.T
I
I
t8l
I

I

I

I
I

I

i

I

I

:\
V
I
!
I
Fig.-7
I
I

l
Define open circuit and short circuit Impedances and also calculate these
I

(b)
I

I
I
Impedances in term of ABCD parameters. t8l
I

I

I

I

I

I

1484L721 Page 5 of7 [107401

:

t"
i

I

OR

Q.4 (a) Show that when two 2 - port Networks N1 and N2 are connected in parallel, the
equivalent Y - parameters of the combined network is the sum of Y
- parameters
of each individual two - port network. t8l
(b) For the Lattice two port network of fig.8 find the Image Impedance and Image
Transfer Constant. t8l

3

r,g.-8

UI\[IT.V

Q.5 (a) Design m - derived T and rc section of Low Pass filter having a design v
lmpedance 600 ohm and cut off frequency of 2000 Hz and a frequency of infinite

alternation f a = 2l00Hz. t8l

(b) Write down short note on active filter. t8l

[484772] Page 6 of7 uo74ol

OR

Q'5 (a) Derive the value of characteristic Impedance for a T type constant K low pass

filter.
t8l
(b) Design a prototype section of band pass filter having cut off
frequency of

1000H2 and 5000H2 and design Impedance of
600O. t8l

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