State Kirchhoff's Current Law (KCL).

State Kirchhoff's Current Law (KCL).

• A. The currents entering a node must equal the currents leaving.
• B. The algebraic sum of voltages around a loop is zero.
• C. Voltage equals current times resistance.
• D. Current is inversely proportional to resistance.

Answer: (A)

KCL is about conserving charge at a junction: all the current flowing into a node must flow out, so the currents entering and leaving balance with no buildup of charge. In practice, you pick a sign convention and sum the currents at the node; if you treat currents into the node as positive, the sum of those currents minus the currents leaving must equal zero. This is why the statement that currents entering a node equal currents leaving is the precise way to capture KCL. The other ideas describe Kirchhoff’s Voltage Law (sum of voltages around a loop is zero) and Ohm’s law (V = IR), with a partial and indirect note about resistance, but they’re not what KCL expresses.

KCL is about conserving charge at a junction: all the current flowing into a node must flow out, so the currents entering and leaving balance with no buildup of charge. In practice, you pick a sign convention and sum the currents at the node; if you treat currents into the node as positive, the sum of those currents minus the currents leaving must equal zero. This is why the statement that currents entering a node equal currents leaving is the precise way to capture KCL. The other ideas describe Kirchhoff’s Voltage Law (sum of voltages around a loop is zero) and Ohm’s law (V = IR), with a partial and indirect note about resistance, but they’re not what KCL expresses.