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What does Kirchhoff's Current Law state for any electrical junction?
AThe algebraic sum of currents at a junction is zero, so total current entering equals total current leaving.
BThe algebraic sum of voltages across resistors in a circuit is always positive.
CCurrent through each branch of a junction must be the same.
DThe total power delivered at a junction must be zero.
Answer & Solution
Correct answer: A. The algebraic sum of currents at a junction is zero, so total current entering equals total current leaving.
Kirchhoff's Current Law is based on conservation of charge: charge does not accumulate at an ideal junction. Therefore, the total current entering the node equals the total current leaving it.