Electrical

Electrical resistance

Türkçe: Elektriksel direnç

The opposition a material offers to current flow; by Ohm's law R = V / I, measured in ohms.

// EXPLANATION

Resistance depends on a conductor's resistivity, length and cross-section. Current through a resistance produces P = I²R of heat, so even small resistance increases at connection points can cause dangerous heating at large currents.

// ALSO KNOWN AS

resistance

// RELATED TERMS

Contact resistanceThe extra resistance at the point where two conductive surfaces meet, caused by surface roughness and oxidation. Joule heatingThe conversion of electrical energy into heat, P = I²·R, as current flows through a conductor. ImpedanceThe total opposition to alternating current; a combination of resistance and reactance, measured in ohms.

// ARTICLES THAT MENTION THIS TERM

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