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.

151.

If the L.T. of the voltage across a capacitor of value 1/2 F is V1 (s) =
s + 1
then value of the current through the capacitor at t = 0+ is
s3 + s2 + s + 1

A. 3 A
B. 2 A
C. 0 A
D. 1 A
Answer» D. 1 A
Discussion
152.

Find the rms value of the wave shown below .

A. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> V<sub>m</sub></center> </td><td rowspan="2"> </td></tr><td align="center">3</td></table>
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 2V<sub>m</sub></center> </td><td rowspan="2"> </td></tr><td align="center">3</td></table>
C. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> V<sub>m</sub></center> </td><td rowspan="2"> </td></tr><td align="center">2</td></table>
D. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> V<sub>m</sub></center> </td><td rowspan="2"> </td></tr><td align="center">2</td></table>
Answer» B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 2V<sub>m</sub></center> </td><td rowspan="2"> </td></tr><td align="center">3</td></table>
Discussion
153.

The number of branches and nodes in the graph are

A. 5, 10
B. 10, 5
C. 10, 10
D. 6, 10
Answer» C. 10, 10
Discussion
154.

In the figure the transformer is ideal with adjustable turns ratio N

A. 1: 1
B. 100: 1
C. 1: 100
D. 1000: 1
Answer» D. 1000: 1
Discussion
155.

A single phase transformer is connected as shown in fig. when a voltage of 100 V (rms) was applied across AB, the voltmeter connected across AC measured 100 V (rms). The turns ratio N

A. 1: 1
B. 1: 2
C. 2: 1
D. 4: 1
Answer» C. 2: 1
Discussion
156.

The Thevenin equivalent of the given at terminal a b will be

A. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/108o1.png">
B. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/108o2.png%20">
C. <img src="http://images.interviewmania.com/wp-content/uploads/2019/05/108o3.png%20">
D. None of these
Answer» E.
Discussion
157.

The current I in the circuit will given by

A. 5 amp
B. 1.2 amp
C. 2.4 amp
D. 0.6 amp
Answer» C. 2.4 amp
Discussion
158.

The complex power in the circuit shown below will be

A. 16.5 6.3
B. 16.5 6.3
C. 33 6.3
D. 33 + 6.3
Answer» B. 16.5 6.3
Discussion
159.

For a given voltage four heating coils will produce max. heat when connected in

A. All in parallel
B. All in series
C. With two parallel pairs in series
D. One pair in parallel with other two in series
E. A and C both
Answer» F.
Discussion
160.

The Thevenin equivalent voltage V

A. J 16 (3 J 4)
B. J 16 (J 3 + 4)
C. J 6 (3 + J 4)
D. J 6 (3 J 4)
Answer» C. J 6 (3 + J 4)
Discussion
161.

Given T.F. H (s) = s + 2 / s

A. 45
B. 0
C. 45
D. 90
Answer» D. 90
Discussion
162.

For the figure given below which of these sets of E, R and C value will ensure that the state equation dV

A. 2 V, 1 , 1.25 F
B. 1.6 V, 0.8 , 1 F
C. 1.6 V, 1 , 0.8 F
D. 2 V, 1.25 , 1 F
Answer» F.
Discussion
163.

Find the value of R so that V

A. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 6</center> </td><td rowspan="2"> </td></tr><td align="center">5</td></table>
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 5</center> </td><td rowspan="2"> </td></tr><td align="center">6</td></table>
C.
D. 2
E. 5
Answer» C.
Discussion
164.

For fig. at time t

A. 2.5 amp, 5 amp/sec
B. 2.5 amp, 2.5 amp/sec
C. 5 amp, 2.5 amp/sec
D. 5 amp, 5 amp/sec
Answer» B. 2.5 amp, 2.5 amp/sec
Discussion
165.

Find the Thevenin voltage and resistance for the network shown below across the terminal A.B

A. 27 V, 3
B. 18 V, 3
C. 27 V, 1
D. 18 V, 8
Answer» B. 18 V, 3
Discussion
166.

Determine the maximum energy stored in the capacitor C for the figure given below

A. 1 joule
B. 10 joule
C. 0.1 joule
D. .001 joule
Answer» B. 10 joule
Discussion
167.

What will be output voltage across the capacitor for the given input shown below?

A. 8 V
B. 12 V
C. 10 V
D. None of these
Answer» B. 12 V
Discussion
168.

The initial voltage on the capacitor is V

A. <table><tr><td rowspan="2">V (t) =</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">cos (t 45 ) +<br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2">e<sup> t</sup> <br></td></tr><td align="center">2</td><td align="center">2</td></table>
B. <table><tr> <td rowspan="2">V (t) = 2 cos (t 45 ) + </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 3</center></td><td rowspan="2">e<sup>+ t</sup> </td></tr><td align="center">2</td></table>
C. <table><tr> <td rowspan="2">V (t) = cos (t 45 ) + </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 1</center></td><td rowspan="2">e<sup> 2t</sup> </td></tr><td align="center">2</td></table>
D. <table><tr> <td rowspan="2">V (t) = cos (t + 45 ) +</td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 3</center></td><td rowspan="2">e<sup> 2t </sup> </td></tr><td align="center">2</td></table>
Answer» B. <table><tr> <td rowspan="2">V (t) = 2 cos (t 45 ) + </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 3</center></td><td rowspan="2">e<sup>+ t</sup> </td></tr><td align="center">2</td></table>
Discussion
169.

Current i at time t = 4 sec will be

A. 5 amp
B. 3 amp
C. 3 amp
D. 5 amp
Answer» C. 3 amp
Discussion
170.

Current i at t = 0.5 sec will be

A. 5 amp
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 5</center></td><td rowspan="2">amp </td></tr><td align="center">3</td></table>
C. 3 amp
D. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 3</center></td><td rowspan="2">amp </td></tr><td align="center">5</td></table>
Answer» B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 5</center></td><td rowspan="2">amp </td></tr><td align="center">3</td></table>
Discussion
171.

Current i at t = 0.5 sec will be

A. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 50</center></td><td rowspan="2">amp </td></tr><td align="center">15</td></table>
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 50</center></td><td rowspan="2">amp </td></tr><td align="center">20</td></table>
C. 5 amp
D. 3 amp
Answer» D. 3 amp
Discussion
172.

Find the current i at time t = 2 sec

A. 2 amp.
B. 2 amp
C. 1 amp
D. None of these
Answer» B. 2 amp
Discussion
173.

The r.m.s. value for the given wave is given by

A. 10/18
B. 2
C. 12/18
D. None of these
Answer» B. 2
Discussion
174.

Calculate the rms value of the given wave

A. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 15</center> </td><td rowspan="2">A </td></tr><td align="center">10</td></table>
B. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 5</center> </td><td rowspan="2">A </td></tr><td align="center">12</td></table>
C. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 15</center> </td><td rowspan="2">A </td></tr><td align="center">9</td></table>
D.
E. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 12</center> </td><td rowspan="2">A </td></tr><td align="center">15</td></table>
Answer» C. <table><tr> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 15</center> </td><td rowspan="2">A </td></tr><td align="center">9</td></table>
Discussion
175.

The maximum energy in the given circuit will be

A. 14.4 joule
B. 126 joule
C. 216 joule
D. None of these
Answer» D. None of these
Discussion
176.

The percentage of power loss in the question 115

A. 5%
B. 2.5%
C. 10%
D. 20%
Answer» C. 10%
Discussion
177.

The total impedance of the circuit shown is

A. 20
B. (20 + J 10)
C. (20 J 10)
D. (20 + J 5)
Answer» B. (20 + J 10)
Discussion
178.

The impulse response of an R-L circuit is a

A. rising exponential function
B. decaying exponential function
C. step function
D. parabolic function
Answer» C. step function
Discussion
179.

The Laplace transform of (t

A. <table><tr><td rowspan="2"> <br>=</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 2</center></td><td rowspan="2"> e<sup> s<sup> <br></sup></sup></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2</center></td><td rowspan="2">e<sup> s</sup> <br></td></tr><td align="center">s<sup>3</sup></td><td align="center">s<sup>2</sup> </td><br></table>
B. <table><tr><td rowspan="2"> <br>=</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 2</center></td><td rowspan="2"> e<sup> s<sup> +<br></sup></sup></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2</center></td><td rowspan="2">e<sup> s</sup> <br></td></tr><td align="center">s<sup>3</sup></td><td align="center">s<sup>2</sup> </td><br></table>
C. <table><tr><td rowspan="2"> <br>=</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 2</center></td><td rowspan="2"> e<sup> 2s<sup> -<br></sup></sup></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">e<sup> s</sup> <br></td></tr><td align="center">s<sup>3</sup></td><td align="center">s </td><br></table>
D. None of these
Answer» E.
Discussion
180.

For the circuit shown below in the figure, the voltage V

A. 2 V
B. 1 V
C. 1 V
D. None of these
Answer» E.
Discussion
181.

The voltage V in the given figure is

A. 2 V
B. <table><tr> <td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4 </center></td><td rowspan="2">V</td></tr><td align="center">3</td></table>
C. 4 V
D. 8 V
Answer» D. 8 V
Discussion
182.

The voltage across the 1 k resistor between A and B of the network shown in the given figure is 10 V 2k 2k 2A 1k A B (A) (B) 14 3 V (C) (D) 26 3 V

A. 12 V
B. <table><tr> <td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>14 </center></td><td rowspan="2">V</td></tr><td align="center">3</td></table>
C. 10 V
D. <table><tr> <td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>26 </center></td><td rowspan="2">V</td></tr><td align="center">3</td></table>
Answer» C. 10 V
Discussion
183.

The V-I relation for network is V = 5 2I, when R = 3 is connected as shown the value of I is given by

A. 5
B. <table><tr> <td rowspan="2"> =</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5 </center></td><td rowspan="2"> amp.</td></tr><td align="center">3</td></table>
C. - 1
D. 1
Answer» E.
Discussion
184.

In the circuit of the given figure, the magnitude of V

A. 2.14 mH
B. 5.30 H
C. 31.8 mH
D. 1.32 H
Answer» D. 1.32 H
Discussion
185.

Initial voltage on capacitor V

A. 1 V
B. 1 V
C. <table><tr> <td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>13 </center></td><td rowspan="2">V</td></tr><td align="center">3</td></table>
D. <table><tr> <td rowspan="2">-</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>13 </center></td><td rowspan="2">V</td></tr><td align="center">3</td></table>
Answer» D. <table><tr> <td rowspan="2">-</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>13 </center></td><td rowspan="2">V</td></tr><td align="center">3</td></table>
Discussion
186.

The natural frequency of the circuit is given by

A. - 6
B. - 8
C. <table><tr> <td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>15 </center></td><td rowspan="2"></td></tr><td align="center">2</td></table>
D. - 10
Answer» B. - 8
Discussion
187.

For the given graph, match List I with List II

A. 3 1 2 4
B. 2 3 1 4
C. 3 2 1 4
D. 1 2 3 4
Answer» B. 2 3 1 4
Discussion
188.

A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then the voltage across the resistor is

A. halved
B. doubled
C. increased by four times
D. not changed
Answer» E.
Discussion
189.

A connected graph has `b' number of branches and `n' number of nodes. Its ranks is

A. b
B. n
C. b 1
D. n 1
Answer» E.
Discussion
190.

The voltage marked V

A. <table><tr> <td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>60 </center></td><td rowspan="2"> V </td></tr><td align="center">7</td></table>
B. <table><tr> <td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>120</center></td><td rowspan="2"> V </td></tr><td align="center">7</td></table>
C. <table><tr> <td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>40</center></td><td rowspan="2"> V </td></tr><td align="center">7</td></table>
D. None of these.
Answer» C. <table><tr> <td rowspan="2"> </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>40</center></td><td rowspan="2"> V </td></tr><td align="center">7</td></table>
Discussion
191.

In the circuit V

A. 2
B. 4
C. 5
D. 6
Answer» C. 5
Discussion
192.

The current I as marked in the figure is

A. 3 A
B. 2 A
C. 1 A
D. 0 A
Answer» D. 0 A
Discussion
193.

The Norton equivalent across BB is given by

A. <table><tr><td rowspan="2"> R<sub>N</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 50</center></td><td rowspan="2"> , I<sub>sc</sub> = <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2</center></td><td rowspan="2"> amp</td></tr><td align="center">26</td><td align="center">5</td><br></table>
B. <table><tr><td rowspan="2"> R<sub>N</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 50</center></td><td rowspan="2"> , I<sub>sc</sub> = <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> amp</td></tr><td align="center">13</td><td align="center">5</td><br></table>
C. <table><tr><td rowspan="2"> R<sub>N</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 50</center></td><td rowspan="2"> , I<sub>sc</sub> = <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2</center></td><td rowspan="2"> amp</td></tr><td align="center">13</td><td align="center">5</td><br></table>
D. None of the above
Answer» C. <table><tr><td rowspan="2"> R<sub>N</sub> =</td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center> 50</center></td><td rowspan="2"> , I<sub>sc</sub> = <br></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>2</center></td><td rowspan="2"> amp</td></tr><td align="center">13</td><td align="center">5</td><br></table>
Discussion
194.

The Thevenin equivalent across AA is given by

A. <table><tr> <td rowspan="2"> V<sub>th</sub> = 5 V, R<sub>th</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>15 </center></td><td rowspan="2"> </td></tr><td align="center">2</td></table>
B. <table><tr> <td rowspan="2"> V<sub>th</sub> = 15 V, R<sub>th</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>15 </center></td><td rowspan="2"> </td></tr><td align="center">4</td></table>
C. <table><tr> <td rowspan="2"> V<sub>th</sub> = 25 V, R<sub>th</sub> = </td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>15 </center></td><td rowspan="2"> </td></tr><td align="center">4</td></table>
D. None of these
Answer» D. None of these
Discussion
195.

Two Incandescent light bulbs of 40 W and 60 W rating are connected in series across the supply voltage, V then

A. the bulbs together consume 100 W
B. the bulbs together consume 50 W
C. the 60 W bulb glows brighter.
D. the 40 W bulb glows brighter.
Answer» D. the 40 W bulb glows brighter.
Discussion
196.

The resonant frequency of the given series is

A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">Hz</td></tr><td align="center">2 3 </td></table>
B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">Hz</td></tr><td align="center">4 3 </td></table>
C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">Hz</td></tr><td align="center">4 2 </td></table>
D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">Hz</td></tr><td align="center">2 2 </td></table>
Answer» E.
Discussion
197.

In the network shown in the figure, the effective resistance forced by the voltage source is

A. 4
B. 3
C. 2
D. 1
Answer» C. 2
Discussion
198.

When a unit impulse voltage is applied to an inductor of 4 H, the energy supplied by the source is

A.
B. 5 J
C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">J</td></tr><td align="center">8 </td></table>
D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">J</td></tr><td align="center">2 </td></table>
Answer» D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">J</td></tr><td align="center">2 </td></table>
Discussion
199.

In the figure below, the current of 1 ampere flows through the resistance of

A. 4
B. 20
C. 30
D. 12
Answer» E.
Discussion
200.

Impedance Z as shown in figure

A. J 29
B. J 9
C. J 19
D. J 39
Answer» C. J 19
Discussion