Purpose of Norton’s theorem: Like Thevenin’s theorem, Norton’s theorem reduces a complex linear network to a simpler, equivalent form that is easier to analyze at a pair of terminals. True or false?
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ATrue
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BFalse
Answer
Correct Answer: True
Explanation
Introduction / Context:Norton’s theorem is the current-source dual of Thevenin’s theorem. Both are powerful reduction techniques that replace a complicated network with an equivalent seen at two terminals, streamlining analysis and design such as matching and load sensitivity checks.
Given Data / Assumptions:
- Linear circuit behavior is assumed at the operating point/frequency.
- Any combination of R, L, C, and controlled sources is allowed if treated correctly.
- We are interested in terminal behavior as “seen” by a load.
Concept / Approach:
Norton’s equivalent consists of a current source In in parallel with an equivalent impedance Zn. Thevenin’s consists of a voltage source Vth in series with Zth. They are related by source transformation: Vth = In * Zth and Zth = Zn. Either form leads to the same load voltage and current for any load, so both simplify the original network to a compact, manageable model.
Step-by-Step Solution:
Find Isc (short-circuit current) at the terminals; this is In.Find Zn by deactivating independent sources or using Voc/Isc.Construct the Norton model: In in parallel with Zn.Optionally convert between Norton and Thevenin to suit analysis preferences.Verification / Alternative check:
Attach a test load RL and compute V and I using both models; results will match, confirming that both theorems serve the same simplification purpose with dual source representations.
Why Other Options Are Wrong:
- “False” would deny Norton’s role as a general reduction method equivalent in power to Thevenin’s theorem.
Common Pitfalls:
Forgetting that dependent sources must remain active when finding Zn; use a test source if necessary. Also, ensure the selected model (Norton or Thevenin) matches the analysis convenience (e.g., current-driven loads favor Norton).
Final Answer:
True