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Code: 15A04201
B.Tech I Year II Semester (R15) Supplementary Examinations December 2019
NETWORK ANALYSIS
(Common to ECE & EIE)
Time: 3 hours Max. Marks: 70
PART ? A
(Compulsory Question)
*****
1 Answer the following: (10 X 02 = 20 Marks)
(a) By using source transformation, convert the circuit shown in figure below into a single voltage
source and single resistance.
(b) In the circuit shown in figure below, determine the value of load resistance when the load resistance
draws maximum power. Also find the value of maximum power.
(c) Define transient time and transient response.
(d) What are critical frequencies? Why are they so called?
(e) Determine the average power delivered to the circuit consisting of an impedance z=5+j8 when the
current flowing through the circuit is I=5 ?30
o
A.
(f) Illustrate the power triangle.
(g) For the circuit shown in figure below, determine the value of capacitive reactance and impedance at
resonance.
(h) For the circuit shown in figure below, determine the value of Q at resonance and bandwidth of the
circuit.
(i) Write the transmission parameters.
(j) Relate the characteristic impedance of T and ?? network.
Contd. in page 2
Page 1 of 4
R15
?
?
+
-
2 ?
2 ?
3 ?
2 ?
1 ?
10 v
A
B
?
?
50 v
+
-
25 ?
I
10 A 5 A
50 ?
~
+j 25 ? -j X e
V s
~
90 ?
100 ?F
10 ?
5 H
10v
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Code: 15A04201
B.Tech I Year II Semester (R15) Supplementary Examinations December 2019
NETWORK ANALYSIS
(Common to ECE & EIE)
Time: 3 hours Max. Marks: 70
PART ? A
(Compulsory Question)
*****
1 Answer the following: (10 X 02 = 20 Marks)
(a) By using source transformation, convert the circuit shown in figure below into a single voltage
source and single resistance.
(b) In the circuit shown in figure below, determine the value of load resistance when the load resistance
draws maximum power. Also find the value of maximum power.
(c) Define transient time and transient response.
(d) What are critical frequencies? Why are they so called?
(e) Determine the average power delivered to the circuit consisting of an impedance z=5+j8 when the
current flowing through the circuit is I=5 ?30
o
A.
(f) Illustrate the power triangle.
(g) For the circuit shown in figure below, determine the value of capacitive reactance and impedance at
resonance.
(h) For the circuit shown in figure below, determine the value of Q at resonance and bandwidth of the
circuit.
(i) Write the transmission parameters.
(j) Relate the characteristic impedance of T and ?? network.
Contd. in page 2
Page 1 of 4
R15
?
?
+
-
2 ?
2 ?
3 ?
2 ?
1 ?
10 v
A
B
?
?
50 v
+
-
25 ?
I
10 A 5 A
50 ?
~
+j 25 ? -j X e
V s
~
90 ?
100 ?F
10 ?
5 H
10v
Code: 15A04201
PART ? B
(Answer all five units, 5 X 10 = 50 Marks)
UNIT ? I
2 (a) State and prove Thevenin?s theorem, find R
th
and V
th
for the network shown in figure below.
(b) Find the power delivered by 5A current source in the circuit shown in figure by using nodal method.
OR
3 (a) Use mesh analysis to find V
x
in the circuit shown in figure below.
(b) Find the current through various branches of the circuit shown in figure below by employing the
superposition theorem.
Contd. in page 3
Page 2 of 4
?
?
2 ?
6 ?
8 ?
8 v
10 v
1 ?
3 ? 6 V
1 ?
1 ?
10 v
+ -
3 ? 1 ?
2 ?
2A
3A
5 ?
-
-
-
-
+
+
+
+
16.67 ? 33.33 ?
0.45 A
25 ?
10 V
30 V
2 v x
v x
10 ? 5 ?
10 ?
50 V
5A
R15
+
-
FirstRanker.com - FirstRanker's Choice
Code: 15A04201
B.Tech I Year II Semester (R15) Supplementary Examinations December 2019
NETWORK ANALYSIS
(Common to ECE & EIE)
Time: 3 hours Max. Marks: 70
PART ? A
(Compulsory Question)
*****
1 Answer the following: (10 X 02 = 20 Marks)
(a) By using source transformation, convert the circuit shown in figure below into a single voltage
source and single resistance.
(b) In the circuit shown in figure below, determine the value of load resistance when the load resistance
draws maximum power. Also find the value of maximum power.
(c) Define transient time and transient response.
(d) What are critical frequencies? Why are they so called?
(e) Determine the average power delivered to the circuit consisting of an impedance z=5+j8 when the
current flowing through the circuit is I=5 ?30
o
A.
(f) Illustrate the power triangle.
(g) For the circuit shown in figure below, determine the value of capacitive reactance and impedance at
resonance.
(h) For the circuit shown in figure below, determine the value of Q at resonance and bandwidth of the
circuit.
(i) Write the transmission parameters.
(j) Relate the characteristic impedance of T and ?? network.
Contd. in page 2
Page 1 of 4
R15
?
?
+
-
2 ?
2 ?
3 ?
2 ?
1 ?
10 v
A
B
?
?
50 v
+
-
25 ?
I
10 A 5 A
50 ?
~
+j 25 ? -j X e
V s
~
90 ?
100 ?F
10 ?
5 H
10v
Code: 15A04201
PART ? B
(Answer all five units, 5 X 10 = 50 Marks)
UNIT ? I
2 (a) State and prove Thevenin?s theorem, find R
th
and V
th
for the network shown in figure below.
(b) Find the power delivered by 5A current source in the circuit shown in figure by using nodal method.
OR
3 (a) Use mesh analysis to find V
x
in the circuit shown in figure below.
(b) Find the current through various branches of the circuit shown in figure below by employing the
superposition theorem.
Contd. in page 3
Page 2 of 4
?
?
2 ?
6 ?
8 ?
8 v
10 v
1 ?
3 ? 6 V
1 ?
1 ?
10 v
+ -
3 ? 1 ?
2 ?
2A
3A
5 ?
-
-
-
-
+
+
+
+
16.67 ? 33.33 ?
0.45 A
25 ?
10 V
30 V
2 v x
v x
10 ? 5 ?
10 ?
50 V
5A
R15
+
-
Code: 15A04201
UNIT ? II
4 (a) Derive the DC response of an RC circuit. Also derive the voltage across the capacitor and resistor.
Draw its responses.
(b) For the above circuit, consider R = 10 ?, C = 0.1F and a constant voltage of 20 V is applied to the
circuit at t = 0. Obtain the current equation, voltage across the capacitor and resistor.
OR
5 (a) The switch in the circuit shown in figure below is closed at t = 0. Find V
2
(t) for all t ? 0 by time
domain method. Assume zero initial current in the inductance.
(b) For the circuit shown in figure below, find the current in the 20 ? when the switch is opened at t=0.
UNIT ? III
6 (a) For the circuit shown in figure below, a voltage of 250 sin ?? ?? is applied. Determine the power factor
of the circuit.
(b) A series RL circuit draws a current of ?? ( ?? ) = 8 sin(50 ?? + 45?) from the source. Determine the circuit
constants, if the power delivered by the source is 100w and there is a lagging power factor of 0.707.
OR
7 (a) What is the relation between bandwidth and resonant frequency?
(b) An inductance of 0.5H a resistance of 5 ? and a capacitance of 8 ?F are in series across a 220 V AC
supply. Calculate the frequency at which the circuit resonates. Find the current at resonance
bandwidth, half power frequencies and the voltage across capacitance of resonance.
Contd. in page 4
Page 3 of 4
+
-
30 ?
10 ?
0.2 H
10 V
V 2(t)
30 ?
50 V
i
+
- 2H
20 ?
?
?
10 i
?
R L
C
5A
A
V 1
V 2 V 3
~
250 sin ?t
100 V
125 V
150 V
R15
FirstRanker.com - FirstRanker's Choice
Code: 15A04201
B.Tech I Year II Semester (R15) Supplementary Examinations December 2019
NETWORK ANALYSIS
(Common to ECE & EIE)
Time: 3 hours Max. Marks: 70
PART ? A
(Compulsory Question)
*****
1 Answer the following: (10 X 02 = 20 Marks)
(a) By using source transformation, convert the circuit shown in figure below into a single voltage
source and single resistance.
(b) In the circuit shown in figure below, determine the value of load resistance when the load resistance
draws maximum power. Also find the value of maximum power.
(c) Define transient time and transient response.
(d) What are critical frequencies? Why are they so called?
(e) Determine the average power delivered to the circuit consisting of an impedance z=5+j8 when the
current flowing through the circuit is I=5 ?30
o
A.
(f) Illustrate the power triangle.
(g) For the circuit shown in figure below, determine the value of capacitive reactance and impedance at
resonance.
(h) For the circuit shown in figure below, determine the value of Q at resonance and bandwidth of the
circuit.
(i) Write the transmission parameters.
(j) Relate the characteristic impedance of T and ?? network.
Contd. in page 2
Page 1 of 4
R15
?
?
+
-
2 ?
2 ?
3 ?
2 ?
1 ?
10 v
A
B
?
?
50 v
+
-
25 ?
I
10 A 5 A
50 ?
~
+j 25 ? -j X e
V s
~
90 ?
100 ?F
10 ?
5 H
10v
Code: 15A04201
PART ? B
(Answer all five units, 5 X 10 = 50 Marks)
UNIT ? I
2 (a) State and prove Thevenin?s theorem, find R
th
and V
th
for the network shown in figure below.
(b) Find the power delivered by 5A current source in the circuit shown in figure by using nodal method.
OR
3 (a) Use mesh analysis to find V
x
in the circuit shown in figure below.
(b) Find the current through various branches of the circuit shown in figure below by employing the
superposition theorem.
Contd. in page 3
Page 2 of 4
?
?
2 ?
6 ?
8 ?
8 v
10 v
1 ?
3 ? 6 V
1 ?
1 ?
10 v
+ -
3 ? 1 ?
2 ?
2A
3A
5 ?
-
-
-
-
+
+
+
+
16.67 ? 33.33 ?
0.45 A
25 ?
10 V
30 V
2 v x
v x
10 ? 5 ?
10 ?
50 V
5A
R15
+
-
Code: 15A04201
UNIT ? II
4 (a) Derive the DC response of an RC circuit. Also derive the voltage across the capacitor and resistor.
Draw its responses.
(b) For the above circuit, consider R = 10 ?, C = 0.1F and a constant voltage of 20 V is applied to the
circuit at t = 0. Obtain the current equation, voltage across the capacitor and resistor.
OR
5 (a) The switch in the circuit shown in figure below is closed at t = 0. Find V
2
(t) for all t ? 0 by time
domain method. Assume zero initial current in the inductance.
(b) For the circuit shown in figure below, find the current in the 20 ? when the switch is opened at t=0.
UNIT ? III
6 (a) For the circuit shown in figure below, a voltage of 250 sin ?? ?? is applied. Determine the power factor
of the circuit.
(b) A series RL circuit draws a current of ?? ( ?? ) = 8 sin(50 ?? + 45?) from the source. Determine the circuit
constants, if the power delivered by the source is 100w and there is a lagging power factor of 0.707.
OR
7 (a) What is the relation between bandwidth and resonant frequency?
(b) An inductance of 0.5H a resistance of 5 ? and a capacitance of 8 ?F are in series across a 220 V AC
supply. Calculate the frequency at which the circuit resonates. Find the current at resonance
bandwidth, half power frequencies and the voltage across capacitance of resonance.
Contd. in page 4
Page 3 of 4
+
-
30 ?
10 ?
0.2 H
10 V
V 2(t)
30 ?
50 V
i
+
- 2H
20 ?
?
?
10 i
?
R L
C
5A
A
V 1
V 2 V 3
~
250 sin ?t
100 V
125 V
150 V
R15
Code: 15A04201
UNIT ? IV
8 (a) Determine the impedance at resonant frequency, 10 Hz above resonant frequency and 10 Hz below
resonant frequency for the circuit shown in figure below.
(b) Derive the Q-factor of a parallel resonance circuit.
OR
9 Derive the voltages of a series RLC circuit. Also derive the bandwidth of it.
UNIT ? V
10 For the circuit shown in figure below, compute its z, y and h-parameters.
OR
11 (a) Design a constant k-low pass filter and high pass filter having a cutoff frequency of 1 kHz with a
load resistance of 600 ?.
(b) Draw the ideal frequency responses of low pass filter, high pass filter, Band pass and Band stop
filter.
*****
Page 4 of 4
R15
~
10 ?
0.1 H
10 ?F
1 ? 2 ?
I 1
4 ?
V 2
V 1
2 ?
I 2
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This post was last modified on 11 September 2020