Kirchhoff's laws

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Kirchhoff's laws

pl n
(General Physics) two laws describing the flow of currents in electric circuits. The first states that the algebraic sum of all the electric currents meeting at any point in a circuit is zero. The second states that in a closed loop of a circuit the algebraic sum of the products of the resistances and the currents flowing through them is equal to the algebraic sum of all the electromotive forces acting in the loop
[C19: after Gustav Robert Kirchhoff]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun1.Kirchhoff's laws - (physics) two laws governing electric networks in which steady currents flow: the sum of all the currents at a point is zero and the sum of the voltage gains and drops around any closed circuit is zero
law of nature, law - a generalization that describes recurring facts or events in nature; "the laws of thermodynamics"
natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
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References in periodicals archive
Kirchhoff's law of thermal emission was formulated in 1859 [1,2].
Kirchhoff's Law of Thermal Radiation (1860) states that the radiant emission and the absorption of a material body in thermodynamic equilibrium are equal (SIEGEL and HOWELL, 1983).
Thus, in the absence of the propagation along the ground wire and the vertical column of the tower only a lumped-constant circuit exists and the sum of three currents leads to the injected current (Kirchhoff's law).
When the switch [K.sub.0] is closed and the K is open, according to Kirchhoff's law, there are
The indirect method can be chosen alternatively, which measures the reflectivity of calibration load, and its emissivity is deduced from the reflectivity by use of Kirchhoff's law. In addition, there are two general types of indirect measurement.
In a series of papers from 2003 to 2015 [1-10], Pierre-Maire Robitaille has challenged the validity of Kirchhoff's Law of thermal emission and Planck's derivation of the mathematical form of the universal function of spectral radiance absorbed and emitted by a black body.
Eddington's theory of the stars, based on ideal gases, depends on Kirchhoff's law, in order to account for stellar spectra [5].
Gedanken experiments have played a major role in building support for Kirchhoff's Law of Thermal Emission [1,2].
Regrettably, even the proof of Kirchhoff's law of thermal emission, as advanced by Max Planck, has been found to be physically unsound [2].
The pillars which supported his ideas included: 1) Kirchhoff's Law of thermal emission [6,7], 2) the irreversability of heat radiation, and 3) the adoption of discrete states.
1, has been derived by combining Kirchhoff's law of thermal emission [3,4] with Stewart law [5,6]:
Not all cavities contain this type of radiation, even if Kirchhoff's law of thermal emission had dictated such an outcome [4, 5].
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