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Kirchoff's Laws

Kirchoff's Current Law

Kirchoff's Current Law

At any node (junction of two or more wires) the total current entering the node equals the total current exiting the node.

In the diagram, I1 + I3 = I2 + I4 + I5

Kirchoff's Voltage Law

Kirchoff's Voltage Law

The sum of voltages in a closed loop is zero.

In the diagram, V1 + V2 + V3 + V4 = 0

Kirchoff's Laws in Physics Problems

Kirchoff's Laws in Basic Circuits

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