Subject Code: 130901
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- III(OLD) EXAMINATION - SUMMER 2019
Date: 04/06/2019
Subject Name: Circuits And Networks
Time: 02:30 PM TO 05:00 PM
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 Define following terms: (a) Linear and Nonlinear Networks (b) Lumped and Distributed Networks (c) Principle of Duality 07
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Q.2 Construct the exact dual of the network of figure.1. 07
Q.3 State Thevenin’s theorem. Calculate current passing through 4O resistance in the circuit shown in figure.2, using Thevenin’s theorem. 07
Q.4 For the circuit shown in figure.3 find the loop currents using mesh analysis. 07
OR
Find the current passing through 3O resistor for the circuit shown in fig.4 using nodal analysis. 07
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Q.5 State and explain Millman’s theorem. 07
Q.6 Derive the expression for rise of current and decay of current in R-L series circuit excited by d.c. voltage source. 07
OR
State and explain Superposition theorem. 07
Q.7 Find current in 20 O resistance in the circuit shown in figure. 5 using superposition theorem. 07
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Q.8 State and explain the Maximum Power Transfer Theorem. Drive the condition for maximum power transfer to the load for DC and AC circuit. 07
Q.9 Find the current in 6 O using Norton’s Theorem for the circuit shown in fig. 6. 07
OR
Explain and derive the step response to R-L series circuit using Laplace Transformation method. 07
Q.10 Write the initial conditions for the inductor and capacitor at t = 0+ and t = 8. 07
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Q.11 Give relationship between y parameters and h parameters. 07
Q.12 Obtain z parameters for the network shown in figure. 7. 07
OR
Q.13 Define following terms: 07
- Graph
- Tree
- Co-tree
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Q.14 Derive relationship between incidence matrix (A), fundamental cut-set matrix (Qr) and fundamental tie-set matrix (Br). 07
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