Explore topic-wise MCQs in Network Theory.

This section includes 179 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.

151.

Find the current “io” in the following circuit.

A. 3 A
B. 3.5 A
C. 6 A
D. 2.5 A
Answer» D. 2.5 A
Discussion
152.

A 500 W discharge lamp takes a current of 4 A at unity p.f. Find the inductance of a choke required to enable the lamp to work on 250 V, 50 Hz main.

A. 1.72 mH
B. 17.2 mH
C. 0.172 H
D. 0.172 mH
Answer» D. 0.172 mH
Discussion
153.

Find the value of current i?

A. 2 A
B. 3 A
C. 1 A
D. 5 A
Answer» D. 5 A
Discussion
154.

Consider the following two-mesh network:(i) The power dissipated in 1 Ω resistor is P1(ii) The power dissipated in 2 Ω resistor is P2(iii) The power dissipated in 3 Ω resistor is P2(iv) The power supplied by the source is PArrange above in increasing order of power

A. (i), (ii), (iii), (iv)
B. (i), (iii), (ii), (iv)
C. (iii), (i), (ii), (iv)
D. (ii), (iii), (i) (iv)
Answer» C. (iii), (i), (ii), (iv)
Discussion
155.

Calculate the dependent source voltage V(b) in the given circuit.

A. 2 V
B. 4 V
C. 8 V
D. 20 V
Answer» C. 8 V
Discussion
156.

Determine the current ia in the given network

A. - 1 A
B. 1 A
C. - 4 A
D. 4 A
Answer» B. 1 A
Discussion
157.

For the network junction shown in the figure, calculate the current I3, given that I1 = 3 A, I2, = 4 A and I4 = 2 A.

A. 3 A
B. 4 A
C. 2 A
D. 6 A
Answer» B. 4 A
Discussion
158.

Determine the current in each branch (I1, I2, I3 and I4) of the given network.

A. I1 = 9 A, I2 = 2.25 A, I3 = 4.5 A and I4 = 2.25 A
B. I1 = 6 A, I2 = 2 A, I3 = 3 A and I4 = 1 A
C. I1 = 8 A, I2 = 2 A, I3 = 4 A and I4 = 2 A
D. I1 = 6 A, I2 = 1.5 A, I3 = 3 A and I4 = 1.5 A
Answer» E.
Discussion
159.

In the circuit shown below, the current drawn by the 6 Ω resistor is 2 A. then the value of resistance R is:

A. 9 Ω
B. 18 Ω
C. 3 Ω
D. 6 Ω
Answer» B. 18 Ω
Discussion
160.

________ is the physical property of an element or device that impedes the flow of current.

A. Resistance
B. Voltage
C. Power
D. Conductance
Answer» B. Voltage
Discussion
161.

In the figure the value of resistor R is (25 + I/2) Ω where I is the current in amperes. The current I is

A. 10 A
B. 20 A
C. 30 A
D. 60 A
Answer» B. 20 A
Discussion
162.

Find Vab

A. 120 V
B. 90 V
C. 48 V
D. 36 V
Answer» B. 90 V
Discussion
163.

All the resistances in the figure shown below are 1 Ω each. The value of current flowing through 1 V source is

A. \(\frac{1}{15}A\)
B. \(\frac{2}{15}A\)
C. \(\frac{4}{15}A\)
D. \(\frac{8}{15}A\)
Answer» E.
Discussion
164.

Find the current “Io” in the following network.

A. 16 A
B. -4 A
C. -2 A
D. 4 A
Answer» C. -2 A
Discussion
165.

If L1 and L2 are the inductances of coil-1 and coil-2, then the total inductance of the magnetic circuit will be represented as

A. L1 - L2 + M
B. L1 + L2 + M
C. L1 + L2 + 2M
D. L1 + L2 + 3M
Answer» D. L1 + L2 + 3M
Discussion
166.

In nodal analysis, the preferred reference node is a node that is connected to1. ground2. many parts of the network3. the highest voltage sourceWhich of the above is/are correct?

A. 1 only
B. 2 only
C. 3 only
D. 1, 2 and 3
Answer» C. 3 only
Discussion
167.

Equivalent resistance of the circuit shown below between X and Y:

A. 6 Ω
B. 9 Ω
C. 18 Ω
D. 12 Ω
Answer» C. 18 Ω
Discussion
168.

Determine the currents in the given network.

A. i1 = 3.125 A, i2 = 5.625 A
B. i1 = 5.125 A, i2 = 3.625 A
C. i1 = 2.125 A, i2 = 4.625 A
D. i1 = 4.125 A, i2 = 2.625 A
Answer» B. i1 = 5.125 A, i2 = 3.625 A
Discussion
169.

In the circuit shown in the figure, find the current flowing through the 8 Ω resistance.

A. 0.25 A
B. 0.50 A
C. 0.75 A
D. 0.10 A
Answer» B. 0.50 A
Discussion
170.

Find the voltage v across the 10 Ω resistor in the following circuit if the control current ix = 2 a.

A. v = - 4 V
B. v = 4 V
C. v = - 40 V
D. v = 40 V
Answer» E.
Discussion
171.

Nodal analysis is based on which of the following law?

A. Ohm’s law
B. Kirchhoff’s voltage law
C. Kirchhoff’s current law
D. Faraday’s law
Answer» D. Faraday’s law
Discussion
172.

Find the value of 'v0' in the following circuit.

A. 12 V
B. 96 V
C. 48 V
D. 24 V
Answer» D. 24 V
Discussion
173.

Determine the source voltage Vs.

A. -30 V
B. 20 V
C. 30 V
D. -20 V
Answer» D. -20 V
Discussion
174.

Determine the voltmeter reading in the given circuit.

A. +15 V
B. 7.5 V
C. +30 V
D. -30 V
Answer» C. +30 V
Discussion
175.

Find the current in each branch of the given network if the total current is 2.55 A.

A. I1 = 1.25 A, I2 = 1.0 A
B. I1 = 1 A, I2 = 1.55 A
C. I1 = 2 A, I2 = 0.25 A
D. I1 = 0.75 A, I2 = 1.5 A
Answer» C. I1 = 2 A, I2 = 0.25 A
Discussion
176.

Consider the configuration shown in the figure which is a portion of a larger electrical networkFor R = 1 Ω and currents i1 = 2 A, i4 = -1 A, i5 = -4 A. Which one of the following TRUE?

A. i6 = 5 A
B. i3 = -4A
C. Data is sufficient to conclude that the supposed currents are impossible
D. Data is insufficient to identify the currents i2, i3, and i6
E. i2 = -1 A
Answer» B. i3 = -4A
Discussion
177.

An average voltage of 40 V is induced in a 1000 turn coil due to a change in flux which occurs in 0.5 seconds. The total flux change in webers is

A. 0.02
B. 0.05
C. 0.01
D. 0.04
Answer» B. 0.05
Discussion
178.

Find the current i in the following circuit.

A. 5 A
B. 4 A
C. 3 A
D. 2 A
Answer» D. 2 A
Discussion
179.

A 230 V lamp is rated to pass a current of 0.24 A. Calculate its power output. If a second similar lamp is connected in parallel to the lamp, calculate the supply current required to give the same power output in each lamp.

A. 0.24 A
B. 1.5 A
C. 1.9 A
D. 0.48 A
Answer» E.
Discussion