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Kirchhoff's junction (or current) rule is a statement of
AConservation of charge at any node
BConservation of momentum
CConservation of mass
DConservation of energy at any node
Answer & Solution
Correct answer: A. Conservation of charge at any node
ΣI_in = ΣI_out — total charge into a node equals total charge out, because charge can neither accumulate nor be created at a junction.
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