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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 – Kirchhoff’s Current Law

Posted on June 20, 2017 by Manish

This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Kirchhoff’s Current Law”.

1. Kirchhoff’s Current law is based on law of conservation of
a) energy
b) momentum
c) mass
d) charge
View Answer

Answer: d
Explanation: Kirchhoff’s current law is based on the law of conservation of charge i.e, charge that flows in = charge that flows out.
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2. The current law represents a mathematical statement of fact that
a) voltage cannot accumulate at node
b) charge cannot accumulate at node
c) charge at the node is infinite
d) none of the mentioned
View Answer

Answer: b
Explanation: Charge cannot accumulate at the node, it can only flow in and out of the node.

3. Kirchhoff’s current law is applied at
a) loops
b) nodes
c) both loop and node
d) none of the mentioned
View Answer

Answer: b
Explanation: Kirchhoff’s current law can be applicable to nodes only.

4. Determine the current in all resistors in the circuit shown below:
network-theory-questions-answers-kirchhoffs-current-law-q4
a) 2A, 4A, 11A
b) 5A, 4.8A, 9.6A
c) 9.3A, 20.22A, 11A
d) 10.56A, 24.65A, 14.79A
View Answer

Answer: d
Explanation: All the resistors are in parallel, so the voltage across each resistor is the same V.
i1=V/7 ,i2 =V/3 , i3=V/5.By current law , 50A = V/7 + V/3 + V/5. On solving, we obtain V and then values of i1,i2, i3.

5. For the circuit below , find the voltage across 5Ω resistor and the current through it
network-theory-questions-answers-kirchhoffs-current-law-q5
a) 1.93 V
b) 2.83 V
c) 3.5 V
d) 5.7 V
View Answer

Answer: b
Explanation: Here all the resistors are connected in parallel and let the voltage be V. Hence, i15=V/15 , i5=V/5 , i2=V/2 , i1=V/1. By kirchhoff’s current law, V/15 + V/5 + V/2 V/1 +5 = 10. On solving equation, we obtain the value of V. As all resistors are in parallel, voltage across each is same as V.
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6. Determine the current through the resistor R3 shown in the figure using KCL
network-theory-questions-answers-kirchhoffs-current-law-q6

a) 25mA
b) 10mA
c) 20mA
d) 35mA
View Answer

Answer: a
Explanation: Using KCL , 60mA = 10mA + 25mA + i3.

7. Find the current i3 in the circuit shown below
network-theory-questions-answers-kirchhoffs-current-law-q7
a) 2A
b) 1A
c) 3A
d) 0.5A
View Answer

Answer: c
Explanation: By applying the KCL at the node in the circuit , 5A = 2A +i3.

8. Kirchhof’s current law can be mathematically stated as :
a) ∑k=0n I = 0
b) i2∑k=0n I = 0
c) i∑k=0n I = 0
d) none of the mentioned
View Answer

Answer: a
Explanation: KCL states that the sum of currents entering and leaving a node is equal to zero.

9. Determine the current if a 20 coulomb charge passes a point in 0.25 seconds
a) 10 A
b) 20 A
c) 2 A
d) 80 A
View Answer

Answer: d
Explanation: By the definition of electric current, I=q/t.
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10. Find the current through the branch containing resistance R3
network-theory-questions-answers-kirchhoffs-current-law-q10
a) 2A
b) 3.25A
c) 2A
d) 2.75A
View Answer

Answer: d
Explanation: By KCL, 5A = 0.25A + 2A + i3.

Sanfoundry Global Education & Learning Series – Network Theory.

To practice all areas of Network Theory, here is complete set of 1000+ Multiple Choice Questions and Answers.

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