Entry

Electricity: Law: Kirchhoff: What are the Kirchhoff laws of electricity?

Apr 16th, 2005 02:19
Knud van Eeden,

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--- Knud van Eeden --- 16 April 2005 - 04:30 pm ----------------------

Electricity: Law: Kirchhoff: What are the Kirchhoff laws of 
electricity?

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Axioms:

-1st law of Kirchhoff:

  The sum of the currents into a given node equals the sum of the
  currents out of that node

  (in other words the sum of the currents at a node in an electric
   network maze equals zero)

  (in other words: what comes in must come out, there is no
   accumulation)

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-2nd law of Kirchhoff:

  The sum of the voltages in a loop of an electric network maze equals
  zero

  (or the sum of electromotive forces in a loop in the network equals
   the sum of potential drops, or voltages across each of the
   resistances, in the loop)

  (in other words: the sum of the energy must be zero. Energy is not
   created, nor destroyed, it remains constant)

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Internet: see also:

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Physics: Nature: Law: Overview: Can you give an overview of the laws 
of nature?
http://www.faqts.com/knowledge_base/view.phtml/aid/35527/fid/677

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