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.

1.

Calculate v1 for the circuit given below?

A. \(\frac{{28}}{5}V\)
B. \(\frac{{48}}{{25}}V\)
C. \(\frac{{128}}{{25}}V\)
D. \(\frac{{12}}{{25}}V\)
Answer» E.
Discussion
2.

Observe the given image and find IT.

A. 4 A
B. 1.2 A
C. 7.5 mA
D. 7.5 A
Answer» E.
Discussion
3.

A practical current source consists of

A. An ideal current source in series with an impedance
B. An ideal current source in parallel with an impedance
C. An ideal current source with no impedance in series or in parallel
D. An ideal current source with high impedance in series
Answer» C. An ideal current source with no impedance in series or in parallel
Discussion
4.

Number of equations required to be analysed in a given network by nodal analysis is equal to

A. The number of independent loops
B. One less than the number of loops
C. The number of nodes
D. One less than the number of nodes
Answer» E.
Discussion
5.

In the above circuit, R1 = R2 = R3 = 3 Ω, what would be the values of RA, RB, RC respectively

A. 4.5 Ω, 4.5 Ω, 4.5 Ω
B. 1.5 Ω, 1.5 Ω, 1.5 Ω
C. 3 Ω, 3 Ω, 3 Ω
D. 1 Ω, 1 Ω, 1 Ω
Answer» E.
Discussion
6.

In the circuit shown below, what will be the power absorbed by the dependent source (voltage source)?

A. 0.125 W
B. 0.25 W
C. 0.75 W
D. 0.5 W
Answer» C. 0.75 W
Discussion
7.

In the above shown circuit, the independent current source generates zero current for t < 0 and a pulse 5te-4t A, for t > 0. At what instant of time, will the current attain the maximum value in the circuit ?

A. 0.25 sec
B. 0.5 sec
C. 1 sec
D. 2 sec
Answer» B. 0.5 sec
Discussion
8.

In the circuit given below, all resistor values are in ohms. Find the voltage across 10 ohms resistor.

A. 1 V
B. 2.5 V
C. 10 V
D. 5.0 V
Answer» B. 2.5 V
Discussion
9.

If the voltage drop across individual resistors R1, R2 and R3 connected to a battery are 10 V, 20 V and 30 V respectively. Then the total battery voltage is:

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

For a series DC circuit, which of the following does NOT hold true?

A. When a number of electrical components are connected in series, the same current flows through all the components of the circuit.
B. The applied voltage across a series circuit is equal to the sum total of voltage drops across each component.
C. The voltage drop across individual components is directly proportional to its resistance value.
D. Total circuit current is the arithmetic sum of the currents passing through individual components connected in parallel.
Answer» E.
Discussion
11.

In the circuit shown below, what is the dissipated power in the 4 Ω resistor?

A. 4 W
B. 2 W
C. 8 W
D. 16 W
Answer» B. 2 W
Discussion
12.

Find the value of Geq in the following circuit.

A. 10 S
B. 20 S
C. 25 S
D. 15 S
Answer» B. 20 S
Discussion
13.

In the given Data were conversion, Find the value of R1, R2 & R3.

A. 9/12, 9/6, 9/8
B. 6/9, 12/9, 8/9
C. 8/9, 6/9, 12/9
D. 9/6, 9/12, 9/8
Answer» D. 9/6, 9/12, 9/8
Discussion
14.

Calculate the current I in the given circuit.

A. 5 A
B. 0.5 A
C. 2 A
D. 2 mA
Answer» D. 2 mA
Discussion
15.

Nodal method of circuit analysis is based ona) KVL and Ohm’s lawb) KVL, KCL and Ohm’s lawc) KCL and KVLd) KCL and Ohm’s lawWhich of the following options is correct?

A. and b) are correct
B. and d) are correct
C. is wrong but a) is correct
D. is correct but b) is wrong
Answer» E.
Discussion
16.

RA and RB are the input resistances of circuits as shown below. The circuits extend infinitely in the direction shown. Which one of the following statements is TRUE?

A. RA = RB
B. RA = RB = 0
C. RA < RB
D. RB = RA (1 + RA)
Answer» E.
Discussion
17.

If an ideal voltage source and ideal current source are connected in series, the combination

A. Has the same properties as a current source alone
B. Has the same properties as a voltage source alone
C. Has the some properties as the source which has a higher value
D. Results in the branch being redundant
Answer» B. Has the same properties as a voltage source alone
Discussion
18.

Calculate the resistance of the given resistor.

A. 65 × 10-2 Ω + 5 percent
B. 65 × 10-2 Ω – 5 percent
C. 65 × 10-2 Ω ± 5 percent
D. 65 × 10-2 Ω
Answer» D. 65 × 10-2 Ω
Discussion
19.

In the network shown in the figure below, the current in the 12 ohm resistor is 5 Amps, the battery voltage E is –

A. 120 V
B. 180 V
C. 300 V
D. 310 V
Answer» D. 310 V
Discussion
20.

Find the current flowing through the 6 Ω resistor in the above figure.

A. 6 A
B. 2 A
C. 4 A
D. 5 A
Answer» D. 5 A
Discussion
21.

Consider the following statements regarding capacitance1. Voltage of capacitance cannot change suddenly2. Current through a capacitance cannot change suddenly.Tick the correct answer:

A. Both statements 1 and 2 are false
B. Statements 1 is false but 2 is true
C. Statements 1 is true and 2 is false
D. Both statements 1 and 2 are true
Answer» D. Both statements 1 and 2 are true
Discussion
22.

In the figure given below the value of R is

A. 2.5 Ω
B. 5.0 Ω
C. 7.5 Ω
D. 10.0 Ω
Answer» D. 10.0 Ω
Discussion
23.

Find Ib?

A. -3 mA
B. 3 mA
C. 0.67 mA
D. -0.67 mA
Answer» B. 3 mA
Discussion
24.

Obtain v0 for the given network in terms of v1, i2 & v3.

A. v0 = 0.2 v1 + 8 i2 + 0.2 v3
B. v0 = 0.2 v1 - 8 i2 + 0.2 v3
C. v0 = 0.2 v1 + 8 i2 - 0.2 v3
D. v0 = 0.2 v1 - 8 i2 - 0.2 v3
Answer» D. v0 = 0.2 v1 - 8 i2 - 0.2 v3
Discussion
25.

Inductive reactance of an inductor is

A. 2πfL
B. 2π/fL
C. 1/2πfL
D. 1/2πv(fL)
Answer» B. 2π/fL
Discussion
26.

In the circuit shown below, the value of the current through 25 Ω is

A. 1 A
B. 1.7 A
C. 2.7 A
D. 3 A
Answer» C. 2.7 A
Discussion
27.

Find the current I.

A. 5 A
B. 2 A
C. 0.8 A
D. -0.8 A
Answer» E.
Discussion
28.

A capacitor charged to 200 V has 2000 μC of charge. The value of capacitance will be _________.

A. 100 F
B. 100 μF
C. 10 μF
D. 10 F
Answer» D. 10 F
Discussion
29.

If a 2 F capacitor has 1 C charge, calculate the voltage across its terminals.

A. 0.5 V
B. 2 V
C. 1.5 V
D. 1 V
Answer» B. 2 V
Discussion
30.

Determine the average and effective values of the given waveform.

A. Vavg = 66.7 V and \(V = \sqrt {133.3}\) V
B. Vavg = 6.67 V and \(V = \sqrt {1333.3}\) V
C. Vavg = 11.5 V and V = 1.33.3 V
D. Vavg = 6.67 V and \(V = \sqrt {133.3}\) V
Answer» E.
Discussion
31.

A non-ideal current source of 25 mA is supplying a resistive load of 5 kΩ. If the actual current flowing through the load is 20 mA, then the internal resistance of the source is:

A. 1 kΩ
B. 10 kΩ
C. 5 kΩ
D. 20 kΩ
Answer» E.
Discussion
32.

Determine the resistance R in the given circuit, if the voltage at node-b is Vb = 5 V.

A. 8 Ω
B. 2 Ω
C. 5 Ω
D. 4 Ω
Answer» D. 4 Ω
Discussion
33.

If the current supplied by the source is 5 A, what will be the source voltage?

A. 20 V
B. 25 V
C. 40 V
D. 50 V
Answer» C. 40 V
Discussion
34.

If the network has a/an ________ between two nodes concept of Supernode is used instead of nodal analysis.

A. voltage source
B. dependent current source
C. independent current source
D. resistor
Answer» B. dependent current source
Discussion
35.

In the circuit below, the voltage across 9 Ω resistor is:

A. 54 V
B. 50 V
C. 75 V
D. 45 V
Answer» E.
Discussion
36.

RA, RB, and RC are equivalent star-connected resistances of a delta circuit. Which one of the following is true?

A. RA = r/2, RB = r/3, RC = r
B. RA = r/3, RB = r/3, RC = r/3
C. RA = r/3, RB = r/2, RC = r
D. \({R_A} = \frac{3}{4}r,\;{R_B} = \frac{2}{3}r,\;{R_C} = \frac{6}{5}r\)
Answer» B. RA = r/3, RB = r/3, RC = r/3
Discussion
37.

Find the EMF of the battery shown in the figure. The voltage drop cross the 8 Ω resistor is 20 V

A. 43.5 V
B. 67.3 V
C. 52 V
D. 24 V
Answer» C. 52 V
Discussion
38.

If the impedance of each phase of a balanced star-connected load is (3 + 2j) Ω, what will be the impedance of the equivalent delta-connected load?

A. (3 + j2) Ω
B. (9 + j6) Ω
C. (3 + j6) Ω
D. (2 + j3) Ω
Answer» C. (3 + j6) Ω
Discussion
39.

For the circuit shown in the figure, the value of voltage VAB is _______.

A. 40 V
B. 25 V
C. 10 V
D. 6 V
Answer» E.
Discussion
40.

An ideal current source should have

A. Zero internal resistance
B. Infinite internal resistance
C. Large value of e.m.f.
D. None of the above
Answer» C. Large value of e.m.f.
Discussion
41.

In an electric circuit, the number of independent meshes M is where B is number of branches and N is number of nodes

A. 2B – N + 1
B. B – N + 1
C. 2B – N - 1
D. B – N -1
Answer» C. 2B – N - 1
Discussion
42.

Find out the node voltages of the given circuit.

A. Va = 0 V, Vb = 120 V
B. Va = 1.89 V, Vb = 16 V
C. Va = 0 V, Vb = 0 V
D. Va = 15 V, Vb = 13.3 V
Answer» E.
Discussion
43.

Find Va - Vb in the following part of a closed circuit where Va and Vb are the potentials at a and b.

A. 10 V
B. 15 V
C. 5 V
D. 20 V
Answer» B. 15 V
Discussion
44.

Find out the value of i

A. 7.985 A
B. 5.009 A
C. 2.889 A
D. - 1.375 A
Answer» E.
Discussion
45.

A cable has two conductors, which are connected together at one end of the cable for testing purposes. When the cable is 700 m long, the resistance of the connected loop is found to be 100 Ω when measuring from the other end. The value of resistance of 8 km long same cable is _______.

A. 1,100 Ω
B. 1,134 Ω
C. 1,200 Ω
D. 1,143 Ω
Answer» E.
Discussion
46.

In a circuit, at a node, two currents I1 and I2 are entering the node and three current I3, I4 and I5 are leaving the node. If KCL is applied at the node, the correct equation will be:

A. I1 + I2 + I3 + I4 + I5 = 0
B. I1 + I3 + I5 = I2 + I4
C. I1 + I2 - I3 - I4 - I5 = 0
D. I1 - I2 = I3 - I4 - I5
Answer» D. I1 - I2 = I3 - I4 - I5
Discussion
47.

An ideal voltage source and an ideal voltmeter have internal impedances respectively:

A. zero, zero
B. zero, infinite
C. infinite, zero
D. infinite, infinite
Answer» C. infinite, zero
Discussion
48.

Find the current through resistor R4 in the figure given below:

A. 0.6 A
B. 0.8 A
C. 0.5 A
D. 1.0 A
Answer» C. 0.5 A
Discussion
49.

For the circuit below,Given: R1 = 5 Ω, R2 = 3 Ω, Vs = 15VCalculate IT.

A. 8A
B. 3A
C. 5A
D. 15A
Answer» B. 3A
Discussion
50.

A practical current source is usually represented by

A. A resistance in series with an ideal current source.
B. A resistance in parallel with an ideal current source.
C. A resistance in parallel with an ideal voltage source.
D. None of the above.
Answer» C. A resistance in parallel with an ideal voltage source.
Discussion