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Superposition Theorem Viva QA

The Superposition Theorem states that in a linear circuit with multiple independent sources, the total response is the sum of the individual responses from each source acting alone. It is applicable only to linear and bilateral circuits, and cannot be used for nonlinear circuits or power calculations. The theorem helps simplify circuit analysis by isolating the effect of each source, but has limitations such as being time-consuming and not valid for circuits with dependent sources.

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60 views2 pages

Superposition Theorem Viva QA

The Superposition Theorem states that in a linear circuit with multiple independent sources, the total response is the sum of the individual responses from each source acting alone. It is applicable only to linear and bilateral circuits, and cannot be used for nonlinear circuits or power calculations. The theorem helps simplify circuit analysis by isolating the effect of each source, but has limitations such as being time-consuming and not valid for circuits with dependent sources.

Uploaded by

rajankumar97413400
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Q: What is Superposition Theorem?

A: It states that in a linear circuit with multiple independent sources, the total response (voltage or

current) is the sum of the responses caused by each source acting alone.

Q: What are the conditions for the Superposition Theorem to be applicable?

A: The circuit must be linear and bilateral, with independent sources and passive elements.

Q: Can Superposition Theorem be applied to nonlinear circuits? Why or why not?

A: No, because the response in nonlinear circuits is not directly proportional to the input.

Q: Can the theorem be applied to power calculations?

A: No, because power is not a linear quantity; it depends on the square of current or voltage.

Q: What is meant by linearity in a circuit?

A: A circuit is linear if its output is directly proportional to its input.

Q: What is the procedure to verify the Superposition Theorem in a circuit?

A: Calculate the contribution of each independent source separately by turning off others, then sum

the individual contributions.

Q: Why do we short circuit voltage sources and open circuit current sources during the

process?

A: To deactivate the sources without altering the rest of the circuit.

Q: What is the significance of measuring individual source effects?

A: It helps to understand each source's contribution to the total response.

Q: Can Superposition Theorem be applied to AC circuits?

A: Yes, but each source must be analyzed separately considering phase and frequency.

Q: Is it valid for both voltage and current analysis?

A: Yes, it can be used to analyze both voltages across and currents through elements.

Q: How is the total response calculated using the Superposition Theorem?

A: By algebraically summing the individual responses due to each source.

Q: What happens if sources are not ideal? Does the theorem still apply?

A: It may not apply accurately if the sources have internal resistance or nonlinear behavior.
Q: Why do we deactivate sources one at a time?

A: To isolate the effect of each source and apply the principle of superposition.

Q: What is meant by the principle of additivity in this context?

A: It means the total response is the sum of individual responses caused by each source.

Q: How does superposition help in simplifying complex circuits?

A: It breaks down the analysis into manageable parts for each source.

Q: What instruments are used to verify the theorem in the lab?

A: DC power supply, ammeter, voltmeter, multimeter, and resistors.

Q: What type of errors might occur during the experiment?

A: Connection errors, reading errors, instrument inaccuracies.

Q: What are the limitations of using Superposition Theorem practically?

A: It is time-consuming for circuits with many sources and not valid for nonlinear or power

calculations.

Q: How do you validate your experimental results?

A: By comparing the sum of individual responses with the actual combined response.

Q: Can dependent sources be turned off during verification? Why or why not?

A: No, dependent sources must remain active as they depend on circuit variables.

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