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What does Kirchhoff's Current Law state for any junction in an electric circuit?
AThe algebraic sum of all voltages in a closed loop is zero.
BThe total current entering a junction equals the total current leaving the junction.
CThe current through every branch of a circuit is always the same.
DThe total resistance entering a junction equals the total resistance leaving the junction.
Answer & Solution
Correct answer: B. The total current entering a junction equals the total current leaving the junction.
Kirchhoff's Current Law is based on conservation of charge: charge does not accumulate at an ideal junction. Therefore, the sum of currents entering a node equals the sum of currents leaving it.