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Can we apply Kirchhoff’s law to magnetic circuits?

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Answer & Explanation
Correct AnswerA. Yes

Quick Explanation

Yes. Magnetic circuits use direct analogies of Kirchhoff's laws: flux continuity at a junction resembles KCL, and the algebraic sum of MMF drops around a magnetic path equals the applied MMF, analogous to KVL.

Formula / Key Relation

Flux junction:
ΣΦ_in = ΣΦ_out
Closed magnetic path:
NI = Σ(Φℜ)
ℜ = l/(μA)

Detailed Explanation

Concept & ReasoningA lumped magnetic circuit can be analysed using the same network structure used for electric circuits. Conservation of magnetic flux at a junction gives a flux-balance relation analogous to current balance, while Ampère's law yields the MMF balance around a closed magnetic path. With F = NI and reluctance ℜ, each section has an MMF drop Φℜ. These relations are routinely called Kirchhoff analogies for magnetic circuits.How to Solve It in the ExamReplace V-I-R with MMF-flux-reluctance.Important Exam PointUse flux continuity and MMF balance exactly as you would node and loop equations.Related Revision PathThis question sits in the revision…

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Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 112
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 112
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 112
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 112
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 112
Assistant Engineer (Electrical), Class-2, Road and Building Department2025Q. 112

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