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According to Kirchhoff's Current Law, what must be true at any junction in an electric circuit?
AThe algebraic sum of currents at the junction is zero
BThe algebraic sum of voltages at the junction is zero
CThe resistance of all branches must be equal
DThe power supplied and consumed at the junction must be equal
Answer & Solution
Correct answer: A. The algebraic sum of currents at the junction is zero
Kirchhoff's Current Law states that charge does not accumulate at a junction, so total current entering equals total current leaving. Hence the algebraic sum of currents at a node is zero.