# Definition of Kirchhoff's laws in English:

## Kirchhoff's laws

### plural noun

Physics
• Two laws concerning electric networks in which steady currents are flowing. The first law states that the algebraic sum of the currents in all the conductors that meet in a point is zero. The second law states that the algebraic sum of the products of current and resistance in each part of any closed path in a network is equal to the algebraic sum of the electromotive forces in the path.

• ‘For branched cycles, Kirchhoff's law can be applied to calculate the resistance of the complete network, in analogy to its use for electric circuits.’
• ‘Since Kirchhoff's laws are derived from general physical properties of electricity, they are applicable to all kinds of electric circuits.’
• ‘In order to quickly measure transmission on any given night, we thus use the alternative approach based on Kirchhoff's law.’
• ‘Proficiency in analyzing circuits with Kirchhoff's laws, particularly with regard to the sign conventions and with solving simultaneous equations, comes with practice.’
• ‘In working with Kirchhoff's law, positive and negative polarities are assigned in the direction of current flow.’

### Origin

Mid 19th century: named after G. R. Kirchhoff (see Kirchhoff, Gustav Robert).

/ˈkɪətʃɒfs/