Kirchhoff’s current law

Network analysis · Intermediate · about 15 minutes · part of Zen’s Electronics Design Mastery

Charge does not pile up at a node: the current flowing into a junction equals the current flowing out.

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How it works

Try it on the bench

1. Turn V2 down to 0 V. Current through R4 now flows out of X instead of in, and the sum still balances.
2. Add another resistor from X to ground.

Parts on the bench

• 2 × Bench power supply
• 4 × Resistor
• 2 × Digital multimeter

In the course

Zen’s Electronics Design Mastery, module “DC Circuit Analysis”.

More on network analysis

• Kirchhoff’s voltage law
• Mesh analysis
• Nodal analysis
• Thévenin equivalent
• Norton equivalent
• Superposition
• Maximum power transfer