Simone Kirby
Ursula Sweeney
Search results
Learn the various meanings and uses of the word resistance, from opposition to electric current to psychological defense. See synonyms, examples, word history, and related phrases of resistance.
Learn the meaning of resistance in English, with examples of usage in different contexts and domains. Find out how to say resistance in other languages, such as Chinese, Spanish and Portuguese.
Sep 12, 2022 · The resistivity of a material is a measure of how strongly a material opposes the flow of electrical current. The symbol for resistivity is the lowercase Greek letter rho, ρ, and resistivity is the reciprocal of electrical conductivity: (9.4.3)ρ =. The unit of resistivity in SI units is the ohm-meter (Ω ⋅ m.
Resistance is the property of an electric circuit or part of a circuit that transforms electric energy into heat energy in opposing electric current. Learn how resistance is measured in ohms, how it depends on length, area, and material, and how it affects the current and voltage in a circuit.
- The Editors of Encyclopaedia Britannica
The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is electrical conductance, measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction.
- R
- ohm (Ω)
- kg⋅m²⋅s−3⋅A−2
Learn how resistance measures the opposition to current flow in an electrical circuit and how to use Ohm's Law to calculate it. See examples of conductors, insulators and fixed-resistance components and how to troubleshoot them.
A force, such as friction, that operates opposite the direction of motion of a body and tends to prevent or slow down the body's motion. A measure of the degree to which a substance impedes the flow of electric current induced by a voltage. Resistance is measured in ohms.
