Dictionary of Electrical Engineering
Commonly used terms in the Electrical industry.

KCL

See KirchoffÃ¢â‚¬â„¢s current law

kcmil

See circular mil

Kerr effect

the quadratic electrooptic effect, particularly in the case for gases and liquids.

kilovar

See VAR

kilovoltampere (KVA)

a measure of apparent power, often in the rating of a piece of equipment or the measure of an electrical load, which is obtained by multiplying the device voltage in kilovolts by the current in amperes.

kilowatthour (KWH)

a measure of electrical energy: 1000 watts delivered for one hour.

Kirchhoff

is best known for discovering the laws that govern electric flow in networks, known now as KirchhoffÃ¢â‚¬â„¢s laws. Kirchhoff is also famous as the inventor of spectroscopy, and his theoretical work led to the quantum theory of matter. Kirchhoff first held a teaching post in Berlin, followed by appointments in Breslau and Heidelberg. In the latter
two universities, Kirchhoff had very fruitful collaborations with Robert Bunsen. KirchhoffÃ¢â‚¬â„¢s studies in electricity provided a foundation for Maxwell and LorenzÃ¢â‚¬â„¢s description of electromagnetic theory.

KirchoffÃ¢â‚¬â„¢s current law (KCL)

a fundamental law of electricity that states that the sum of the currents entering and exiting a circuit node must be equal to 0.

KirchoffÃ¢â‚¬â„¢s laws

laws that govern the relationships between voltages/currents in a circuit/network. See also KirchoffÃ¢â‚¬â„¢s voltage law, KirchoffÃ¢â‚¬â„¢s current law.

KirchoffÃ¢â‚¬â„¢s voltage law (KVL)

a fundamental law of electricity that states that the sum of the voltage drops and rises in a closed loop must equal 0.