rOmV4 - Basics Kirchoff

If all the potential differences (voltages) across all the compolnets (in a closed loop) are added together, the total is equal to the power supply potential difference (voltage).

Kirchoff's Current Law

At a junction in a circuit, the sum of the currents entering the junction is equal to the sum of the currents leaving the junction.

It might help to picture counting cars, entering and leaving a road junction. This works in the same way. In this circuit, currents entering are given a minus sign. Currents leaving are given a plus sign.

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Basics Kirchoff

Kirchoff's Voltage Law

Kirchoff's Current Law