PTU B.Tech ECE 3rd Semester May 2019 57585 NETWORK ANALYSIS AND SYNTHESIS Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 3rd Semester May Electronic and Communication Engineering (ECE)

Roll No.
Total No. of Pages : 03
Total No. of Questions : 09
B.Tech.(ECE / Electronics & Computer Engg. / ETE) (2011 Onwards)
B.Tech. (Electronics Engg.) (2012 Onwards) (Sem.?3)
NETWORK ANALYSIS AND SYNTHESIS
Subject Code : BTEC-303
M.Code : 57585
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
have to attempt any T WO questions.

SECTION-A
Ql. Answer briefly :


a. State various properties of LC networks.


b. Define h-parameters and draw its equivalent h-model.


5s 3

c. Find f() if F



(s)
s(s 1)

d. A series RL circuit has R = 10K, L = 10mH and C = 1F. Find the Transfer function
of the circuit.
2
s 50s 14

e. Check the positive realness of F


( s )
s 12

f. Differentiate between Network Analysis and Network Synthesis. Name the methods to
solve them.

g. Using nodal analysis in Fig. 1 find the value of current in 20 resistor.
5
2A
10
20
24V
36V

Fig.1
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h. If two circuits X and Y are to be connected in cascade. Give the two port parameters of
the combination with diagram cascade combination.
2
s 4s 3

i. Find response of H
for step input.
( s )
2
s 6s 8

j. Find condition for a 2-port network using Z and Y-Parameters to be reciprocal.
SECTION-B
Q.2 Find the value of ZL in Fig. 2 so that maximum power is transferred to it. Also find the
value of maximum power transferred.
10
2
A
30A
5
ZL
1
1
B

Fig. 2
Q.3 Find Y-parameters of the network of Fig. 3.
I1
I1
1
2
V1
2
4
V2

Fig. 3
Q.4 Steady state is achieved in the given circuit of Fig. 4 with switch, S open. Find the value of
I(t) for t > 0,if switch S is closed at t = 0.
2
1H
I (+)
1
+
25V
0.5
1F
?

Fig. 4
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Q.5 Using Nodal analysis, find I in the circuit of Fig. 5.
1
2
1
2
2
I
5V
1
2
2
2
5V

Fig. 5
Q.6 Classify filters and analyze any one type of filter in detail.

SECTION-C
Q.7 Synthesize a network using Foster-I and Foster -II forms for the impedance function :
2
s(s 9)
Z (s)

2
2
(s 5) (s 13)
Q.8 If an m-derived high pass filter has design impedance of 500 and cut off frequency of 3.5
KHz and infinite attenuation at 2.6 KHz, design the filter.
Q.9 Find current through ZL in Fig. 6 using Norton's theorem and verify the result using
Thevenin Theorem.

530?V
A
1
+
+
2
I
?
?j2
10 (ZL)
5
B

Fig. 6




NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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