Code: A-08
Subject: CIRCUIT THEORY & DESIGN
Time: 3 Hours
Max. Marks: 100
NOTE: There are 11 Questions in all.  
  • Question 1 is compulsory and carries 16 marks. Answer to Q. 1. must be written in the space provided for it in the answer book supplied and nowhere else.
  • Answer any THREE Questions each from Part I and Part II. Each of these questions carries 14 marks.
  • Any required data not explicitly given, may be suitably assumed and stated.
Q.1
Choose the correct or best alternative in the following:
(2x8)
 
a. The average power absorbed by a passive network
(A) is always zero.
(B) is always positive.
(C) is always negative.
(D) may be positive or zero but never negative.
b. Millman's theorem yields
(A) equivalent voltage source.
(B) equivalent voltage or current source.
(C) equivalent resistance.
(D) equivalent impedance.
c. The superposition theorem is applicable to
(A) current only. (B) voltage only.
(C) both current and voltage. (D) current , voltage and power.
d. At t = 0+ with zero initial conditions, which of the following acts as an open circuit ?
(A) inductor (B) capacitor
(C) resistor (D) all of these
e. In a parallel RLC circuit, the quality factor at resonance is given by
(A) (B)
(C) (D)
f. For a reciprocal network, the two - port ABCD parameters are related as follows
(A) AD - BC = -1 (B) AD - BC = 0
(C) AD - BC = 0 (D) AC - BD = 1  
g. For the circuit shown in Fig.1g, the current i(t) will be:
(A) 7.5 sin (1000 t) A. (B) - 7.5 sin (1000 t) A.
(C) 7.5 cos (1000 t) A. (D) -7.5 cos (1000 t) A.
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