Network Theorems - Electronic Engineering (MCQ) questions & answers

1)   What is the value of impedance 'Z2' according to Miller's theorem for the network shown below?

a. Z.K /K-1
b. Z /1-K
c. Z /K-1
d. Z-1 /K
Answer  Explanation 

ANSWER: Z.K /K-1

Explanation:
No explanation is available for this question!


2)   Why does the Superposition theorem not applicable to power?

a. Because it is proportional to square of current and current is a non-linear function
b. Because it is proportional to square of voltage and voltage is a non-linear function
c. Both a and b
d. None of the above
Answer  Explanation 

ANSWER: Because it is proportional to square of current and current is a non-linear function

Explanation:
No explanation is available for this question!


3)   What would be the computational value of current through the galvanometer for Thevenin's equivalent circuit shown below?

a. 16.66 mA
b. 83.33 mA
c. 55.55 mA
d. 30 mA
Answer  Explanation 

ANSWER: 55.55 mA

Explanation:
No explanation is available for this question!


4)   Which operation is likely to get executed or performed by Millman's theorem in terms of converting the voltage or current sources into a single equivalent voltage or current source?

a. Subtraction
b. Combination
c. Differentiation
d. Integration
Answer  Explanation 

ANSWER: Combination

Explanation:
No explanation is available for this question!


5)   Which value of load impedance (ZL) is necessary to be connected across the terminals R-S for maximum power transfer in the network shown below ?

a. 5 + j5 Ω
b. 5 - j5 Ω
c. 10 + j10 Ω
d. 10 - j10 Ω
Answer  Explanation 

ANSWER: 10 - j10 Ω

Explanation:
No explanation is available for this question!


6)   What would be the nature of 'ZL', if 'Zeq' reactance is inductive according to 'Maximum power transfer theorem'?

a. Inductive
b. Capacitive
c. Resistive
d. All of the above
Answer  Explanation 

ANSWER: Capacitive

Explanation:
No explanation is available for this question!


7)   Which among the following is also regarded as 'Dual of Thevenin's Theorem'?

a. Norton's Theorem
b. Superposition Theorem
c. Millman's Theorem
d. Maximum Power Transfer Theorem
Answer  Explanation 

ANSWER: Norton's Theorem

Explanation:
No explanation is available for this question!


8)   Which is the correct sequential order of steps to be undertaken while applying Thevenin's theorem?

A. Calculation of Thevenin's equivalent voltage
B. Removal of branch impedance through which required current is to be estimated
C. Estimation of equivalent impedance between two terminals of the branch
D. Estimation of branch current by schematic representation of Thevenin's equivalent circuit


a. A, C, B, D
b. B, A, C, D
c. D, A, C, B
d. B, C, D, A
Answer  Explanation 

ANSWER: B, A, C, D

Explanation:
No explanation is available for this question!


9)   What should be done, if the dependent current and voltage sources are present in a circuit while applying 'Superposition Theorem'?

a. Replace them by open circuit
b. Replaced them by short circuit
c. Keep in their original form without replacing by either open or short circuits
d. None of the above
Answer  Explanation 

ANSWER: Keep in their original form without replacing by either open or short circuits

Explanation:
No explanation is available for this question!


10)   Which theorem assists in replacement of an impedance branch over the network by the other network comprising different circuit components, without affecting the V-I relations throughout the entire network?

a. Superposition Theorem
b. Compensation Theorem
c. Substitution Theorem
d. Maximum Power Transfer Theorem
Answer  Explanation 

ANSWER: Substitution Theorem

Explanation:
No explanation is available for this question!