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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-II EXAMINATION WINTER 2018
Subject Code:X20901 Date: 05/01/2019
Subject Name: Circuits And Networks
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Explain:
Conservation of Charge Conservation of Energy
07

Explain Dot convention with example.
07
Q.2

Define following terms
Tree Mesh Active Element Passive Element 5)Unilateral Network Bilateral Network Link
07

In Circuit of Fig.1,switch is closed at t=0.Obtain the general solution and particular solution for current i(t).Obtain the value of current at time t=0.1 sec.
07
Q.3

Explain Maximum Power Transfer Theorem.
07

In series R-C circuit shown in fig.2 have capacitor with initial charge q0=2500μC.At switch is closed and constant voltage source 100Volts is applied to the circuit. Use Laplace transform method to find the current.
07
Q.4

Enlist initial and final condition of network elements.
07

In fig.3,the switch k is changed from position 1 to 2 at t=0.Find values of di/dt and d2i/dt2 at if R=1000Ω, 1H C=0.1μF and V=100V
07
Q.5

Derive Y-parameters in terms of Z-parameters.
07

Obtain Z-parameter for network shown in fig.4
07
Q.6

Derive h-parameter in terms of g-parameters
07

Determine Y-parameter for Twin-T network shown in fig. 5
07
Q.7

Write Short note on: Duality
07

Enlist the condition for reciprocity and symmetry in all two port networks.
07
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