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Kirchhoff's Current Law states that at any junction in an electric circuit, the total current entering the junction is equal to the total current leaving it. Which physical principle is this law based on?
AConservation of charge
BConservation of energy
COhm's law
DFaraday's law of induction
Answer & Solution
Correct answer: A. Conservation of charge
Kirchhoff's Current Law follows from conservation of charge. Charge cannot accumulate indefinitely at an ideal junction, so the sum of currents entering must equal the sum of currents leaving.