11) The dual of a parallel R-C circuit is a
a) series R-C circuit
b) series R-L circuit
c) Parallel R-C circuit
d) Parallel R-L circuit
12) In a network containing resistances and reactances the roots of the characteristic equation given for the circuit
a) the force response
b) the total response
c) the natural response
d) the damped response
13) A voltage source having an open circuit voltage of 200 V and internal resistance of 50Ω is equivalent to a current source of
a) 4A with 50Ω in parallel
b) 4A with 50Ω in series
c) 0.5A with 50Ω in parallel
d) none of the mentioned
14) A two port network is reciprocal, if and only if
a) Z11 = Z22
b) BC – AD = -1
c) Y12 = Y21
d) h12 = h21
15) Bartlett’s bisection theorem holds for which one of the following terminal network ?
a) Reciprocal network
b) Balanced network
c) Symmetric network
d) Non-linear network
16) What is the locus of the tip of the voltage phasor across R in a series R-L-C circuit ?
a) A parabola
b) An ellipse
c) A circle
d) A rectangular hyperbola
17) If a unit step current is passed through a capacitor what will be the voltage across the capacitor ?
a) 0
b) A step function
c) A ramp function
d) An impulse function
18) For a network of 11 branches and 6 nodes, what is the number of independent loops ?
a) 4
b) 5
c) 6
d) 11
19) A network has 4 nodes and 3 independent loops. What is the number of branches in the network ?
a) 5
b) 6
c) 7
d) 8
20) The lowest and the highest critical frequency of an R-L driving-point impedance are, respectively
a) a zero, a pole
b) a pole, apole
c) a zero, a zero
d) a pole, a zero