GATE 2008 ECE Network Theory - Complete Video Solutions with Answers

2008


1. In the following graph, the number of trees (P) and the number of cut-sets (Q) are
a) P = 2, Q = 2
b) P = 2, Q = 6
c) P = 4, Q = 6
d) P = 4, Q = 10

Answer: C





2. In the following cirucit, the switch S is closed at t = 0. The rate of change of current di(0+)/dt is given by


Answer: B
Solution:    https://www.youtube.com/watch?v=WiYzbTZyhi0




3. The Thevenin equivalent impedance ZTH between the nodes P and Q in the following circuit is


Answer: A
Solution:     https://www.youtube.com/watch?v=vl6exaG9eY0



4. The driving point impedance of the following network is given as shown. The component values are

Answer: D
Solution:   https://www.youtube.com/watch?v=CI2Na_stYRg




Common Data Questions: 5 & 6
The following series RLC circuit with zero initial conditions is excited by a unit impulse function δ(t).
5. For t > 0, the output voltage Vc(t) is

Answer: D
Solution:   https://www.youtube.com/watch?v=DB4jmdoaFIk




6. For t > 0, the voltage across the resistor is


Answer: B
Solution:    https://www.youtube.com/watch?v=nn6PggFjKgA




Statement for Linked Answer Questions: 7 & 8
A two port network shown below is excited by external DC sources. The voltages and the currents are measured with voltmeters V1, V2 and ammeters A1, A2 (all assumed to be ideal), as indicated. Under following switch conditions, the readings obtained are:


7. The Z-parameter matrix for this network is

Answer: C



8. The h-parameter network for this network is


Answer: A
Solution (7  &  8):      https://www.youtube.com/watch?v=_-paorTBZZg





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