Explore topic-wise MCQs in Network Theory.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.

1.

For the circuit given below, the value of z11 parameter is ____________

A. z11 = 1.775 + j5.739 Ω
B. z11 = 1.775 – j4.26 Ω
C. z11 = -1.775 – j4.26 Ω
D. z11 = 1.775 + j4.26 Ω
Answer» E.
Discussion
2.

For the circuit given below, the value of z21 parameter is ____________

A. z21 = 0.0667 Ω
B. z21 = 2.773 Ω
C. z21 = 1.667 Ω
D. z21 = 0.999 Ω
Answer» B. z21 = 2.773 Ω
Discussion
3.

Given two voltages, 50 ∠0 V and 75 ∠- 60° V. The sum of these voltages is ___________

A. 109 ∠- 60° V
B. 109 ∠- 25° V
C. 109 ∠- 36.6° V
D. 100 ∠- 50.1° V
Answer» D. 100 ∠- 50.1° V
Discussion
4.

Consider a cube having resistance R on each of its sides. For this non-planar graph, the number of independent loop equations are _______________

A. 8
B. 12
C. 7
D. 5
Answer» E.
Discussion
5.

Consider a circuit having resistances 16 Ω and 30 Ωis excited by a voltage V. A variable resistance R is connected across the 16 Ω resistance. The power dissipated in 30 Ω resistance will be maximum when value of R is __________

A. 30 Ω
B. 16 Ω
C. 9 Ω
D. 0
Answer» D. 0
Discussion
6.

Consider a series RL circuit in which current 12 A is flowing through R and current 16 A is flowing through L. The current supplied by the sinusoidal current source I is ____________

A. 28 A
B. 4 A
C. 20 A
D. Cannot be determined
Answer» D. Cannot be determined
Discussion
7.

A 50 Hz current has an amplitude of 25 A. The rate of change of current at t = 0.005 after i = 0 and is increasing is ____________

A. 2221.44 A/s
B. 0
C. -2221.44 A/s
D. -3141.6 A/s
Answer» C. -2221.44 A/s
Discussion
8.

Two coils X and Y have self-inductances of 5 mH and 10 mH and mutual inductance of 3 mH. If the current in coils X change at a steady rate of 100 A/s, the emf induced in coil Y is ____________

A. 0.3 V
B. 0.5 V
C. 1 V
D. 1.5 V
Answer» B. 0.5 V
Discussion
9.

A magnetic circuit has an iron length of 100 cm and air gap length 10 cm. If μr = 200 then which of the following is true?

A. Mmf for iron and air gap are equal
B. Mmf for iron is much less than that for air gap
C. Mmf for iron is much more than that for air gap
D. Mmf for iron and air gap are not equal
Answer» B. Mmf for iron is much less than that for air gap
Discussion
10.

The Thevenin’s equivalent of a network is a 10 V source in series with 2 Ω resistances. If a 3 Ω resistance is connected across the Thevenin’s equivalent is _____________

A. 10 V in series with 1.2 Ω resistance
B. 6 V in series with 1.2 Ω resistance
C. 10 V in series with 5 Ω resistance
D. 6 V in series with 5 Ω resistance
Answer» C. 10 V in series with 5 Ω resistance
Discussion
11.

Barletts Bisection Theorem is applicable to ___________

A. Unsymmetrical networks
B. Symmetrical networks
C. Both unsymmetrical and symmetrical networks
D. Neither to unsymmetrical nor to symmetrical networks
Answer» C. Both unsymmetrical and symmetrical networks
Discussion
12.

A parallel RLC circuit with R1 = 20, L1 = \(\frac{1}{100}\) and C1 = \(\frac{1}{200}\) is scaled giving R2 = 104, L2 = 10-4 and C2, the value of C2 is ___________

A. 0.10 nF
B. 0.3 nF
C. 0.2 nF
D. 0.4 nF
Answer» D. 0.4 nF
Discussion
13.

The energy stored in a coil is 108 J. The power dissipated instantaneously across the blades of switch after it is opened in 10 ms is ____________

A. 108 W
B. 1080 W
C. 10800 W
D. 108000 W
Answer» D. 108000 W
Discussion
14.

Consider an RL series circuit having resistance R = 3 Ω, inductance L = 3 H and is excited by 6V. The current after a long time after closing of switch is ____________

A. 1 A
B. 2 A
C. 0 A
D. Infinity
Answer» C. 0 A
Discussion
15.

If the diameter of a wire is doubled, the current carrying capacity of the wire is ___________

A. Half
B. Twice
C. Four times
D. One-fourth
Answer» D. One-fourth
Discussion