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Suppose one branch current entering a node increases while all other branch currents remain unchanged. According to Kirchhoff's Current Law, what must happen?
AAt least one current leaving the node must increase or one entering current must decrease to maintain equality
BThe node voltage must become zero immediately
CAll branch currents must become equal
DKirchhoff's Current Law no longer applies
Answer & Solution
Correct answer: A. At least one current leaving the node must increase or one entering current must decrease to maintain equality
KCL requires total entering current to equal total leaving current. If one entering current increases and everything else stayed exactly the same, the equality would be violated. So some other branch current must adjust: typically a leaving current increases or another entering current decreases.