Explore topic-wise MCQs in Network Theory.

This section includes 289 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.

101.

The equation for the waveform shown in the figure in terms of the linear combination of step functions

A. f (t) = 10 u (t 2) 10 u (t 4) 15 u (t 7) + 15 u (t 10)
B. f (t) = 10 u (t 2) 15 u (t 7)
C. f (t) = 10 u (t 2) + 10 u (t 4) 15 u (t 7) + 15 u (t 10)
D. None of the above
Answer» B. f (t) = 10 u (t 2) 15 u (t 7)
Discussion
102.

The unit step of the ramp is

A. u (t 4) + u (t 3)
B. 2 [u (t 3) u (t 4)]
C. 2 (t 3) {u (t 3) u (t 4)}
D. 2 {u (t 3) u (t 4)}
Answer» D. 2 {u (t 3) u (t 4)}
Discussion
103.

The waveform shown in a sweep voltage used to defect the beam in a cathode ray oscilloscope. The transform of this function can be written as

A. <table><tr><td rowspan="2">F (s) =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> as</sup> </center></td><td rowspan="2"><br></td></tr><td align="center">as<sup>2</sup> </td><td align="center">s(1 e<sup> as</sup>)</td></table>
B. <table><tr><td rowspan="2">F (s) =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> as</sup> </center></td><td rowspan="2"><br></td></tr><td align="center">as </td><td align="center">s(1 e<sup> as</sup>)</td></table>
C. <table><tr><td rowspan="2">F (s) =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup>as</sup> </center></td><td rowspan="2"><br></td></tr><td align="center">as<sup>2</sup> </td><td align="center">s(1 e<sup> as</sup>)</td></table>
D.
E. <table><tr><td rowspan="2">F (s) =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> as</sup> </center></td><td rowspan="2"><br></td></tr><td align="center">as<sup>2</sup> </td><td align="center">s(1 + e<sup> as</sup>)</td></table>
Answer» B. <table><tr><td rowspan="2">F (s) =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> -<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> as</sup> </center></td><td rowspan="2"><br></td></tr><td align="center">as </td><td align="center">s(1 e<sup> as</sup>)</td></table>
Discussion
104.

The Z-parameter representation of the 2-port network shown in the figure is

A. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/192o1.png%20">
B. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/192o2.png">
C. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/192o3.png%20">
D. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/192o4.png%20">
Answer» B. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/192o2.png">
Discussion
105.

The power delivered by the dependent source

A. 864 W
B. 864 W
C. 288 W
D. 288 W
Answer» B. 864 W
Discussion
106.

Which one of the following impedance values of load will cause maximum power to be transferred to the load for the network shown in the given figure?

A. (2 + j2)
B. (2 j2)
C. j2
D. 2
Answer» E.
Discussion
107.

For the figure shown below the Norton's equivalent parameter will be

A. 6 , 2 3 amp
B. <table><tr> <td rowspan="2">12 , </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4</center></td><td rowspan="2">amp</td></tr><td align="center">3</td></table>
C.
D. 6 , 2 amp
E. 12 , 4 amp
Answer» B. <table><tr> <td rowspan="2">12 , </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4</center></td><td rowspan="2">amp</td></tr><td align="center">3</td></table>
Discussion
108.

The value of the resistance R in the circuit shown in the given figure is varied in such a manner that the power dissipated in 5 resistor is maximum. Under this condition, the value of R will be

A. 20
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>40</center></td><td rowspan="2"> </td><td rowspan="2"> </td></tr><td align="center">3</td></table>
C.
D. 30
Answer» C.
Discussion
109.

Calculate the Thevenin resistance for the circuit shown below between A and B

A. 10
B. 12
C. 20
D. 18
Answer» C. 20
Discussion
110.

If L {f (t)} =
s2 + 2
A. cannot be determined
B. Zero
C. 1
D.
Answer» B. Zero
Discussion
111.

Switch S in position (a) for a long time and moves to be at t = 0. The value of V

A. 12 V, 8 V
B. 12 V, 8 V
C. 4 V, 8 V
D. 4 V, 8 V
Answer» B. 12 V, 8 V
Discussion
112.

For the circuit shown below current to through the inductor is given by the relation

A. 5 amp.
B. (1.1 1) + 1
C. (1.1 1) + 1
D. None of these
Answer» E.
Discussion
113.

Which one statement is correct for the circuit given below?

A. Output in stable
B. Output in unstable
C. Cannot be calculated from the given data
D. None of these
Answer» C. Cannot be calculated from the given data
Discussion
114.

Given i

A. 200 V
B. 100 V
C. 0 V
D. 100 V
Answer» C. 0 V
Discussion
115.

The rms value of the current in the a.c. circuit as shown below in the figure will be

A. 2 A
B. 4 A
C. 5 A
D. 8 A
Answer» C. 5 A
Discussion
116.

The value of Thevenin resistance for the given figure shown below between A and B will be

A. 10
B. 20
C. 15
D. 0
Answer» E.
Discussion
117.

What will be the value of R

A. 2 R
B. <table><tr> <td rowspan="2"></td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2">(1 J) </td></tr><td align="center">2</td></table>
C. <table><tr> <td rowspan="2"></td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>R</center></td><td rowspan="2">(J 1) </td></tr><td align="center">2</td></table>
D. R
Answer» E.
Discussion
118.

A Network is said to be linear if and only if

A. the response is proportional to the excitation function
B. the principle of superposition applies
C. the principle of homogeneity applied
D. Both (B) and (C)
Answer» E.
Discussion
119.

The value of R required for maximum power transfer in the network shown below is

A. 50
B. 20
C. 30
D. 25
Answer» C. 30
Discussion
120.

The time constant of the network shown in the figure is

A. 2 RC
B. RC
C. <table><tr> <td rowspan="2"></td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>CR</center></td><td rowspan="2"> </td></tr><td align="center">4</td></table>
D. <table><tr> <td rowspan="2"></td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>CR</center></td><td rowspan="2"> </td></tr><td align="center">2</td></table>
Answer» B. RC
Discussion
121.

The value of current I flowing in 5 resistor in the figure, is

A. 10 amp
B. 2 amp
C. 5 amp
D. 7 amp
Answer» C. 5 amp
Discussion
122.

The Y

A. <table><tr><td rowspan="2">Y<sub>11</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">+<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2">+ 6 s<br></td></tr><td align="center">2</td><td align="center">5</td><td align="center">5s</td></table>
B. <table><tr><td rowspan="2">Y<sub>11</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">+<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ 6 s<br></td></tr><td align="center">3</td><td align="center">5</td><td align="center">5s</td></table>
C.
D. <table><tr><td rowspan="2">Y<sub>11</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">+<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ 6 s<br></td></tr><td align="center">2</td><td align="center">5s</td><td align="center">5</td></table>
E. <table><tr><td rowspan="2">Y<sub>11</sub> = </td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/aptitude/1-sym-oparen-h1.gif"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;">1</td><td rowspan="2"> + 6s</td><td rowspan="2"><img src="https://www.indiabix.com/_files/images/data-interpretation/common/15-sym-cparen-h1.gif"> </td></tr><tr><td style="text-align: center;">5</td></tr></table>
Answer» B. <table><tr><td rowspan="2">Y<sub>11</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">+<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">+ 6 s<br></td></tr><td align="center">3</td><td align="center">5</td><td align="center">5s</td></table>
Discussion
123.

What will be the value of
dVC
for given figure?
dt
A. 3 V/sec
B. 2 V/sec
C. 3 V/sec
D. 2 V/sec
Answer» B. 2 V/sec
Discussion
124.

What will b e the value of
diL
for given figure?
dt
A. H/sec
B. 1 H/sec
C. 2 H/sec
D. 2 H/sec
Answer» C. 2 H/sec
Discussion
125.

What will be the voltage across the capacitor at t = 0

A. 2 V
B. 2 V
C. 4 V
D. 1 V
Answer» C. 4 V
Discussion
126.

Switch S in position (1) for long time and moved to position (2) at t = 0 sec. obtain at t = 0

A. 3 amp
B. 6 amp
C. 2 amp
D. 5 amp
Answer» B. 6 amp
Discussion
127.

Consider the network graph shown in figure. Which one of the following is 'not' a tree of this graph?

A. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/40oa.png%20">
B. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/40ob.png%20">
C. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/40oc.png%20">
D. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/40od.png%20">
Answer» C. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/40oc.png%20">
Discussion
128.

For a given network, the number of independent mesh equations (m) and the number of independent node equations (n) are related as follows (A) (B) (C) (D)

A. m > n always
B. m < n always
C. m = n always
D. m or < n depending upon the form of the network.
Answer» E.
Discussion
129.

For the given graphs shown below which one is nonplanar graph?

A. (i) only
B. (i) and (ii)
C. (ii) only
D. (iii) only
Answer» E.
Discussion
130.

For the above figure what is the maximum number of branches you may add before the resulting structure becomes nonplanar?

A. 4
B. 5
C. 6
D. None of these
Answer» C. 6
Discussion
131.

For the graph shown below. Find the minimum number of branches that may be added to make the resulting structure non-planar

A. 2
B. 3
C. 4
D. None of these
Answer» C. 4
Discussion
132.

The graph of a network has six branches with three tree branches. The minimum number of equations required for the solution of the network is

A. 2
B. 3
C. 4
D. 5
Answer» C. 4
Discussion
133.

A planar graph has 4 nodes and 5 branches the number of meshes in dual graph is

A. 5
B. 4
C. 3
D. 2
Answer» D. 2
Discussion
134.

Steady state is reached for the circuit. VC as marked in the circuit is

A. 0
B. 4
C. 5
D. <table><tr> <td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>10 </center></td><td rowspan="2"></td></tr><td align="center">3</td></table>
Answer» C. 5
Discussion
135.

The Laplace transform of the function f (t) = e

A. <table><tr><td rowspan="2"></td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2"> +<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> 4s</sup> </center></td><td rowspan="2">e<sup> t</sup> <br></td></tr><td align="center">s<sup>2</sup></td><td align="center">2s</td></table>
B. <table><tr> <td rowspan="2"></td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> 4s2</sup></center></td><td rowspan="2"></td></tr><td align="center">s<sup>3</sup> </td></table>
C. <table><tr> <td rowspan="2"></td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>e<sup> 4s</sup></center></td><td rowspan="2"></td></tr><td align="center">s<sup>3</sup> </td></table>
D. does not exist
Answer» E.
Discussion
136.

The natural frequency S

A. 1
B. -1
C. <table><tr> <td rowspan="2">-</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1 </center></td><td rowspan="2"></td></tr><td align="center">2</td></table>
D. 2
Answer» C. <table><tr> <td rowspan="2">-</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1 </center></td><td rowspan="2"></td></tr><td align="center">2</td></table>
Discussion
137.

In the figure below, the voltage across the 18 ohm resistor is 90 volts. What is the total voltage across the combined circuit at terminal E and F?

A. 125 V
B. 16 V
C. 24 V
D. 40 V
Answer» B. 16 V
Discussion
138.

A network has 7 nodes and 5 independent loops. The number of branches in the network is

A. 13
B. 12
C. 11
D. 10
Answer» D. 10
Discussion
139.

Given H (s) =
X
=
s + 1
. x (t) = cos t 0 . The phasor Y is given by
Ys2 + s + 1
A. 2 45
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2"> 45 </td></tr><td align="center">2</td></table>
C.
D. 1 0
E. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 2</center></td><td rowspan="2"> tan<sup> 1</sup> 1 tan<sup> 1</sup> 2 </td></tr><td align="center">5</td></table>
Answer» C.
Discussion
140.

If the number of branches in a network is B, the number of nodes is N and the number of dependent loop is L, then the number of independent node equations will be

A. N + L 1
B. B 1
C. N 1
D. B N
Answer» D. B N
Discussion
141.

S is in position (a) for a long time. S moved to position (b) at t = 0 , At t = 0

A. 5, 0
B. 5, 0
C. 0, 4
D. 2, 3
Answer» B. 5, 0
Discussion
142.

S is open, V

A. 0, 6
B. 2, 0
C. 1, 3
D. 0, 3
Answer» E.
Discussion
143.

A voltage has a value of V = 180 cos (t + 12 ) and current i = 2.5 cos (t + 5 ) the power factor of the circuit is

A. 0.978
B. 0.996
C. 0.993 lead
D. 0.993 lag
Answer» E.
Discussion
144.

The Laplace transforms of the functions tu(t) and u (t) sin t are respectively

A. <table><tr><td rowspan="2"> </td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">,<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>s</center></td><td rowspan="2"><br></td></tr><td align="center">s</td><td align="center">s<sup>2</sup> + 1 </td></table>
B. <table><tr><td rowspan="2"> </td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">,<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"><br></td></tr><td align="center">s</td><td align="center">s<sup>2</sup> + 1 </td></table>
C.
D. <table><tr><td rowspan="2"> </td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">,<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"><br></td></tr><td align="center">s<sup>2</sup></td><td align="center">s<sup>2</sup> + 1 </td></table>
E. <table><tr> <td rowspan="2">s, </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 5</center> </td></tr><td align="center">s<sup>2</sup> + 1 </td></table>
Answer» D. <table><tr><td rowspan="2"> </td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">,<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"><br></td></tr><td align="center">s<sup>2</sup></td><td align="center">s<sup>2</sup> + 1 </td></table>
Discussion
145.

A long uniform coil of inductance 2L and associated resistance 2R ohms is physically cut into two exact halves which are rewound in parallel. The resistance and inductance of the combination are

A. R and L
B. 2R and 2L
C. <table><tr><td rowspan="2"> </td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> R</center></td><td rowspan="2">and<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>L</center></td><td rowspan="2"><br></td></tr><td align="center">2</td><td align="center">2</td></table>
D.
E. <table><tr><td rowspan="2"> </td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> R</center></td><td rowspan="2">and<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>L</center></td><td rowspan="2"><br></td></tr><td align="center">4</td><td align="center">4</td></table>
Answer» D.
Discussion
146.

The Thevenin equivalent of the following network between A and B is

A. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/86o1.png%20">
B. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/86o2.png%20">
C. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/86o3.png%20">
D. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/86o4.png%20">
Answer» B. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/86o2.png%20">
Discussion
147.

The voltmeter in the shown circuit is ideal. The transformer has identical windings with perfect coupling. The voltmeter reads

A. 110 V
B. 220 V
C. 440 V
D. 0 V
Answer» E.
Discussion
148.

The capacitor C

A. 8 V
B. 10 V
C. 12 V
D. 15 V
Answer» B. 10 V
Discussion
149.

A capacitor is charged by a square wave current source, the voltage across the capacitor is

A. a square wave
B. a triangular wave
C. a step function
D. zero
Answer» C. a step function
Discussion
150.

The time constant of the circuit

A. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 60</center> </td><td rowspan="2">C </td></tr><td align="center">5</td></table>
B.
C. 15 C
D. 25 C
E. None of these
Answer» C. 15 C
Discussion