Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Summer 3rd Sem 3131707 Network Analysis Previous Question Paper
Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER? III EXAMINATION ? SUMMER 2020
Subject Code: 3131707 Date:04/11/2020
Subject Name: Network Analysis
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 following terms: (a) Linear and Nonlinear Networks (b) Unilateral and
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Bilateral Networks.
(b) Define following terms: (a) Time-Invariance and Time variance Networks. (b)
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Active and Passive Networks with example.
(c) Explain ideal, practical and dependent voltage and current sources with all
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necessary diagrams.
Q.2 (a) Determine the inductance between the terminals for a three coil shown in fig 1
03
(b) For the network shown in the fig 2, determine the numerical value of the branch
04
current i1 using sources transformation theorem.
(c) Determine the node voltages V1, V2 and V3 in a network of fig 3, using nodal
07
analysis.
OR
(c) Find the current I1, I2, I3 and I4 for the network shown in fig 4, using mesh
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analysis
Q.3 (a) State and explain Reciprocity theorem with example.
03
(b) Determine current i in a circuit shown in fig 5, using Super position theorem.
04
(c) Find the Norton's equivalent circuit across the terminal AB of the network
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shown in fig 6.
OR
Q.3 (a) State and explain maximum power transfer theorem. Derive the condition for
03
maximum power transfer to Resistive load for DC circuit
(b) State and explain Millman's theorem with proof.
04
(c) Find the curr
ent in 6 ohm resistor in the network shown in fig 7, using
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Thevenin's theorem
Q.4 (a) Write the initial conditions in the inductor and capacitor at = 0+ and = .
03
(b) Find out the values of V, dV/dT and d2V/dT2 just after switching (at time t
04
= 0+) in the circuit shown in fig 8.
(c) For the circuit shown in the fig 9, the switch `S' is at position `1' and the steady
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state condition is reached. The switched is moved to position `2' at t = 0. Find
the current i(t) in both the cases, i.e. switch at position 1 and switch is at position
2
OR
Q.4 (a) Write equations of Short circuit Admittance and Open Circuit Impedance
03
parameters of a two port network.
(b) Derive the relationship between h-parameters and ABCD parameters
04
(c) Find Z parameters for the network of fig 10.
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1
Q.5 (a) State and explain final value theorem with proof.
03
(b) Explain and derive the step response to R-L series circuit using Laplace
04
Transformation method. (Fig 14.)
(c) In the network of fig 11, if the switch has remained in position A for a long
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time and then moves to position B at t = 0. Find vc(t) for t >= 0 for R2 = 405
ohm. (405 resistor is shown in fig.11)
OR
Q.5 (a) Define following terms: (a) Oriented graph (b) Co-tree. c) Cut-set
03
(b) How many trees are possible for the graph of the network of fig 12.
04
(c) For the network shown in fig 13, draw the oriented graph and write i) the
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Incidence matrix, ii) Tieset matrix, and iii) f-Cutset matrix.
Fig 2.
Fig 1.
Fig 4.
Fig 3.
Fig 5.
Fig 6.
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Fig 8.
Fig 7.
Fig 9.
Fig 10.
Fig 11.
Fig 12.
Fig 14.
Fig 13.
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This post was last modified on 04 March 2021