Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 3132406 Circuit Theory Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132406 Date: 30/11/2019
Subject Name: Circuit Theory
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Marks
Q.1 (a) Define: (i) electric current (ii) 1-volt (iii) electrical
power.
03
(b) What are the network elements and how it respond when
electric energy supplied to it. What are the relationship
between voltage and current in resister, inductor and
capacitor ?
04
(c) Find the current and voltage drop through 5 ? resistor in
the network of Fig. (1) using Node voltage analysis.
07
Q.2 (a) Define: (i) principle node (ii) branches (iii) graph. 03
(b) Using Mesh analysis, find the current flow through the
50V source in the network of Fig. (2).
04
(c) Explain maximum power transfer theorem with the help
of circuit network. Derive the equation of maximum
power for AC circuits. Also give the condition for
maximum power transfer.
07
OR
(c) Explain Superposition theorem for AC Networks with the
help of circuit network.
07
Q.3 (a) Why study initial condition? Enlist the advantages which
results from this understanding of initial condition.
03
(b) Find the Norton?s equivalent circuit for the network given
in Fig. (3). Obtain current through 5 ? resistor.
04
(c) Find Vo/c by nodal analysis for the given network of
Fig.(4).
07
OR
Q.3 (a) Mention the initial and final condition for R, L & C
components in the different cases.
03
(b) Explain transmission parameters and hybrid parameters. 04
(c) Calculate the current passing through 10 ? resistor in the
network shown in Fig. (5). Use Mesh current method.
07
Q.4 (a) Derive y- parameters in terms of z-parameters. 03
(b) Apply nodal analysis for the network shown in Fig. (6)
and find current across 2 ? resistor connected between
two nodes.
04
(c) Find voltage Vx in the network as shown in Fig. (7) using
Superposition Theorem.
07
OR
Q.4 (a) Derive z- parameters in terms of y-parameters. 03
(b) Explain ?poles? & ?zeros? with respect to circuit theory. 04
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132406 Date: 30/11/2019
Subject Name: Circuit Theory
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Marks
Q.1 (a) Define: (i) electric current (ii) 1-volt (iii) electrical
power.
03
(b) What are the network elements and how it respond when
electric energy supplied to it. What are the relationship
between voltage and current in resister, inductor and
capacitor ?
04
(c) Find the current and voltage drop through 5 ? resistor in
the network of Fig. (1) using Node voltage analysis.
07
Q.2 (a) Define: (i) principle node (ii) branches (iii) graph. 03
(b) Using Mesh analysis, find the current flow through the
50V source in the network of Fig. (2).
04
(c) Explain maximum power transfer theorem with the help
of circuit network. Derive the equation of maximum
power for AC circuits. Also give the condition for
maximum power transfer.
07
OR
(c) Explain Superposition theorem for AC Networks with the
help of circuit network.
07
Q.3 (a) Why study initial condition? Enlist the advantages which
results from this understanding of initial condition.
03
(b) Find the Norton?s equivalent circuit for the network given
in Fig. (3). Obtain current through 5 ? resistor.
04
(c) Find Vo/c by nodal analysis for the given network of
Fig.(4).
07
OR
Q.3 (a) Mention the initial and final condition for R, L & C
components in the different cases.
03
(b) Explain transmission parameters and hybrid parameters. 04
(c) Calculate the current passing through 10 ? resistor in the
network shown in Fig. (5). Use Mesh current method.
07
Q.4 (a) Derive y- parameters in terms of z-parameters. 03
(b) Apply nodal analysis for the network shown in Fig. (6)
and find current across 2 ? resistor connected between
two nodes.
04
(c) Find voltage Vx in the network as shown in Fig. (7) using
Superposition Theorem.
07
OR
Q.4 (a) Derive z- parameters in terms of y-parameters. 03
(b) Explain ?poles? & ?zeros? with respect to circuit theory. 04
2
(c) Illustrate the transient and steady state portion of the
solution to a given network in Fig. (8) when switch
moved from position ?b? to ?a? at t = 0. Find the
expression for current.
07
Q.5 (a) Discuss relationship of two port variables. 03
(b) Discuss frequency response for parallel resonance. 04
(c) A series RLC circuit having zero inductor current and
zero capacitor voltage is excited by 20 Volt dc source.
Assume R = 10 ?, L = 2H and C = 10 uF and a switch
?K? is connected in series with RLC. Find i(0
+
) and di / dt
(0
+
).
07
OR
Q.5 (a) Discuss interconnections of two port networks. 03
(b) Discuss frequency response for series resonance. 04
(c) In the network shown in Fig. (9), switch ?K? is moved
from position ?a? to ?b? at t =0, steady state having
previously been attained. Determine current i(t).
07
Fig. (1) Q.1 (c) Fig. (2) Q.2 (b)
Fig. (3) Q. 3 (b) Fig. (4) Q. 3 (c)
Fig. (5) OR Q. 3 (c) Fig. (6) Q. 4 (b)
Fig. (7) Q. 4 (c) Fig. (8) OR Q. 4 (c) Fig (9) OR Q 5 (C)
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 3132406 Date: 30/11/2019
Subject Name: Circuit Theory
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Marks
Q.1 (a) Define: (i) electric current (ii) 1-volt (iii) electrical
power.
03
(b) What are the network elements and how it respond when
electric energy supplied to it. What are the relationship
between voltage and current in resister, inductor and
capacitor ?
04
(c) Find the current and voltage drop through 5 ? resistor in
the network of Fig. (1) using Node voltage analysis.
07
Q.2 (a) Define: (i) principle node (ii) branches (iii) graph. 03
(b) Using Mesh analysis, find the current flow through the
50V source in the network of Fig. (2).
04
(c) Explain maximum power transfer theorem with the help
of circuit network. Derive the equation of maximum
power for AC circuits. Also give the condition for
maximum power transfer.
07
OR
(c) Explain Superposition theorem for AC Networks with the
help of circuit network.
07
Q.3 (a) Why study initial condition? Enlist the advantages which
results from this understanding of initial condition.
03
(b) Find the Norton?s equivalent circuit for the network given
in Fig. (3). Obtain current through 5 ? resistor.
04
(c) Find Vo/c by nodal analysis for the given network of
Fig.(4).
07
OR
Q.3 (a) Mention the initial and final condition for R, L & C
components in the different cases.
03
(b) Explain transmission parameters and hybrid parameters. 04
(c) Calculate the current passing through 10 ? resistor in the
network shown in Fig. (5). Use Mesh current method.
07
Q.4 (a) Derive y- parameters in terms of z-parameters. 03
(b) Apply nodal analysis for the network shown in Fig. (6)
and find current across 2 ? resistor connected between
two nodes.
04
(c) Find voltage Vx in the network as shown in Fig. (7) using
Superposition Theorem.
07
OR
Q.4 (a) Derive z- parameters in terms of y-parameters. 03
(b) Explain ?poles? & ?zeros? with respect to circuit theory. 04
2
(c) Illustrate the transient and steady state portion of the
solution to a given network in Fig. (8) when switch
moved from position ?b? to ?a? at t = 0. Find the
expression for current.
07
Q.5 (a) Discuss relationship of two port variables. 03
(b) Discuss frequency response for parallel resonance. 04
(c) A series RLC circuit having zero inductor current and
zero capacitor voltage is excited by 20 Volt dc source.
Assume R = 10 ?, L = 2H and C = 10 uF and a switch
?K? is connected in series with RLC. Find i(0
+
) and di / dt
(0
+
).
07
OR
Q.5 (a) Discuss interconnections of two port networks. 03
(b) Discuss frequency response for series resonance. 04
(c) In the network shown in Fig. (9), switch ?K? is moved
from position ?a? to ?b? at t =0, steady state having
previously been attained. Determine current i(t).
07
Fig. (1) Q.1 (c) Fig. (2) Q.2 (b)
Fig. (3) Q. 3 (b) Fig. (4) Q. 3 (c)
Fig. (5) OR Q. 3 (c) Fig. (6) Q. 4 (b)
Fig. (7) Q. 4 (c) Fig. (8) OR Q. 4 (c) Fig (9) OR Q 5 (C)
3
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This post was last modified on 20 February 2020