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Network Theory Multiple Choice Questions | MCQs | Quiz

Network Theory Interview Questions and Answers
Practice Network Theory questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Circuit Elements
•   Voltage & Current Sources
•   Ohm's Law
•   Kirchhoffs Current Law
•   Kirchhoffs Voltage Law
•   Tree & Co-Tree
•   Tie Set Matrix
•   Tree Branch Voltages
•   Mesh Analysis
•   Supermesh Analysis
•   Nodal Analysis
•   Supernode Analysis
•   Star Delta Transformation
•   Superposition Theorem
•   Thevenins Theorem
•   Nortons Theorem
•   Reciprocity Theorem
•   Compensation Theorem
•   Power Transfer Theorem
•   Tellegens Theorem
•   Millmans Theorem
•   Sine Wave Angular Relation
•   Sine Wave Voltage
•   Resistor Phase Relation
•   Impedence Diagram
•   Series Circuits
•   Parallel Circuits
•   Instantaneous Power
•   Average Power
•   Power Factors
•   Reactive Power
•   Mesh AC Analysis
•   Nodal AC Analysis
•   Superposition AC Theorem
•   Thevenins AC Theorem
•   Nortons AC Theorem
•   Power Transfer Theorem
•   Series Resonance
•   RLC Circuits Bandwidth
•   Parallel Resonance
•   Resonant Frequency
•   Polyphase System
•   Three Phase Sources
•   Star Delta Transformation
•   Star Connected System
•   Delta Connected System
•   Balanced Circuits
•   Unbalanced Circuits
•   Power Measurement
•   R-L Circuit DC Response
•   R-C Circuit DC Response
•   R-L-C Circuit DC Response
•   Sinusoidal R-L Circuits
•   Sinusoidal R-C Circuits
•   Sinusoidal R-L-C Circuits
•   Laplace Transforms
•   Operational Transforms
•   Inverse Transforms
•   S Domain Circuit Elements
•   Transfer Function
•   Impulse Function
•   Complex Frequency
•   Series & Parallel Elements
•   One Port & Two Port
•   Poles & Zeros
•   Driving Point Functions
•   Transfer Functions
•   Open Circuit Parameters
•   Short Circuit Parameters
•   Transmission Parameters
•   Different Parameters
•   Two Port Networks
•   Network Termination
•   Image Parameters
•   Filter Networks
•   Pass & Stop Band
•   Constant K Low Pass Filter
•   M-Derived T-Section
•   Attenuators
•   Inverse Network
•   Series Equalizer
•   Shunt Equalizer
•   Hurwitz Polynomials
•   Reactive One-Ports
•   Foster One Ports Method
•   Cauer One Ports Method
•   Foster R-L Network Method
•   Cauer R-L Network Method
•   Foster R-C Network Method
•   Cauer R-C Network Method

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Network Theory Questions and Answers – Network Function for the One-Port and Two-Port

Posted on June 20, 2017 by Manish

This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Network Function for the One-Port and Two-Port”.

1. The ratio of voltage transform at first port to the voltage transform at the second port is called?
a) Voltage transfer ratio
b) Current transfer ratio
c) Transfer impedance
d) Transfer admittance
View Answer

Answer: a
Explanation: Voltage transfer ratio is the ratio of voltage transform at first port to the voltage transform at the second port and is denoted by G(s). G21 = V2(s)/V1(s) G12 = V1(s)/V2(s).
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2. The ratio of the current transform at one port to current transform at other port is called?
a) Transfer admittance
b) Transfer impedance
c) Current transfer ratio
d) Voltage transfer ratio
View Answer

Answer: c
Explanation: Current transfer ratio is the ratio of the current transform at one port to current transform at other port and is denoted by α(s). α12(s) = I1(s)/I2(s) α21(s) = I2(s)/I1(s).

3. The ratio of voltage transform at first port to the current transform at the second port is called?
a) Voltage transfer ratio
b) Transfer admittance
c) Current transfer ratio
d) Transfer impedance
View Answer

Answer: d
Explanation: Transfer impedance is the ratio of voltage transform at first port to the current transform at the second port and is denoted by Z(s). Z21(s) = V2(s)/I1(s) Z12(s) = V1(s)/I2(s).

4. For the network shown in the figure, find the driving point impedance.
network-theory-questions-answers-network-function-one-port-q4
a) (s2-2s+1)/s
b) (s2+2s+1)/s
c) (s2-2s-1)/s
d) (s2+2s-1)/s
View Answer

Answer: b
Explanation: Applying Kirchoff’s law at port 1, Z(S)=V(S)/I(S), where V(s) is applied at port 1 and I(s) is current flowinmg through the network. Then Z(S)=V(S)/I(S) = 2+S+1/S = (s2+2s+1)/s.

5. Obtain the transfer function G21 (S) in the circuit shown below.
network-theory-questions-answers-network-function-one-port-q5
a) (s+1)/s
b) s+1
c) s
d) s/(s+1)
View Answer

Answer: d
Explanation: Applying Kirchhoff’s law V1 (S) = 2 I1 (S) + 2 sI1 (S) V2 (S) = I1 (S) X 2s Hence G21 (S) = V2(s)/V1(s) =2 s/(2+2 s)=s/(s+1).
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6. Determine the transfer function Z21 (S) in the circuit shown in question 5.
a) s
b) 2 s
c) 3 s
d) 4 s
View Answer

Answer: b
Explanation: The transfer function Z21 (S) is Z21 (S) = V2(S)/I1(S). V2 (S) = I1 (S) X 2s. V2(S)/I1(S)=2s. On substituting Z21 (S) = 2s.

7. Find the driving point impedance Z11 (S) in the circuit shown in question 5.
a) 2(s+2)
b) (s+2)
c) 2(s+1)
d) (s+1)
View Answer

Answer: c
Explanation: The driving point impedance Z11 (S) is Z11 (S)=V1(S)/I1(S). V1 (S) = 2 I1 (S) + 2 sI1 (S) => V1(S) = (2+2s)I1(S) => V1(S)/I1(S) = 2(s+1). On substituting Z11 (S) = 2(S+1).

8. Obtain the transfer function G21 (s) in the circuit shown below.
network-theory-questions-answers-network-function-one-port-q8
a) (8 S+2)/(8 S+1)
b) (8 S+2)/(8 S+2)
c) (8 S+2)/(8 S+3)
d) (8 S+2)/(8 S+4)
View Answer

Answer: d
Explanation: From the circuit, the parallel combination of resistance and capacitance can be combined into equivalent in impedance. Zeq(S) = 1/(2 S+1/2)=2/(4 S+1). Applying Kirchhoff’s laws, we have V2 (S) = 2 I1(S) => V1 (S) = I1 (S)[2/(4 S+1)+2] = I1 (S)[(8 S+4)/(4 S+1)] The transfer function G21 (s) = V2(s)/V1(s) =2 I1(S)/((8 S+4)/(4 S+1))I1(S) =(8 S+2)/(8 S+4).

9. Obtain the transfer function Z21(s) in the circuit shown in question 8.
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: b
Explanation: The transfer function Z21(s) is Z21 (S) = V2(S)/I1(S). V2 (S) = 2 I1(S) => V2 (S)/I1 =2. On substituting Z21(s) = 2.

10. Determine the driving point impedance Z11(S) in the circuit shown in question 8.
a) (8 S+4)/(4 S+4)
b) (8 S+4)/(4 S+3)
c) (8 S+4)/(4 S+2)
d) (8 S+4)/(4 S+1)
View Answer

Answer: d
Explanation: The driving point impedance Z11(S) is Z11(S) = V1(s)/I1(s). V1(s) = I1(s)((2/(4s+1))+2) = I1(s)((8s+4)/(4s+1)) => V1(s)/I1(s) = ((8s+4)/(4s+1)). On substituting we get Z11(S) = (8S+4)/(4S+1).
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Sanfoundry Global Education & Learning Series – Network Theory.

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