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Concept & ReasoningKirchhoff's Current Law is the circuit form of charge conservation. If net current flowed continuously into an ideal node, charge would accumulate and its potential would change without bound. In lumped network analysis the node has negligible storage volume, so the net rate of charge accumulation is zero and the sum of incoming currents equals the sum of outgoing currents. More generally, continuity gives Σi = -dq/dt; KCL is the dq/dt ≈ 0 lumped-node case.How to Solve It in the ExamKCL = conservation of charge.Important Exam PointUse an algebraic sign convention: all entering positive or all leaving positive.Related…