Kirchhoff's laws

Kirchhoff's law(s), named after Gustav Robert Kirchhoff, is a term applied to two entirely different concepts.

Kirchhoff's circuit laws: This is a pair of rules (common in electrical engineering) to analyze electric circuits, which can be derived from Maxwell's equations.
Kirchhoff's law (thermodynamics) is a theorem about thermal radiation from heated objects, equating emission and absorption, and is derived from general considerations of thermal equilibrium.

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