Kirchhoff's Law

Kirchhoff's Current Law
The basic law which states that the sum of currents flowing into any junction of an electric circuit is equal to the sum of currents flowing out of the junction.
where
Ii = currents impinging on node

Kirchhoff's Voltage Law
The basic law which states that the sum of voltage sources around any closed circuit is equal to the sum of the individual voltage drops across the resistances of the circuit.
where
Vi = potential differences around loop

Kirchhoff's Law of Radiation
The emissivity of a body is equal to its absorptance at the same temperature.

Kirchhoff's First Law
An incandescent solid or gas under high pressure will produce a continuous spectrum.

Kirchhoff's Second Law
A low-density gas will radiate an emission-line spectrum with an underlying emission continuum.

Kirchhoff's Third Law
Continuous radiation viewed through a low-density gas will produce an absorption-line spectrum.

See also: Ampere, Kirchoff, Gustav, Volt.

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Subjects: Physics