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Ohms & Kirchhoff's Law Tutorial

 Ohms & Kirchhoff's Law

Kirchhoff's Current Law

The algebraic sum of currents entering and leaving any point in a circuit must equal zero.

Stated another way

No matter how many paths into and out of a single point all the current leaving that point must equal the current arriving at that point.

Ohms & Kirchhoff's Law

Kirchhoff's Voltage Law

The algebraic sum of the voltages around any closed path is zero.

 

Stated another way

The voltage drops around any closed loop must equal the applied voltages.

Ohms & Kirchhoff's Law

When voltages are opposing as seen at the right, the difference is the voltage applied to the circuit. In this case 4 volts must be dropped by the resistors to equal the applied voltage.

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