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Learn the various meanings and uses of the word resistance, from opposition to a psychological defense mechanism. See synonyms, examples, word history, and related phrases for resistance.
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.
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 that acts to stop the progress of something or make it slower: The car's speed was reduced by air / wind resistance. [ C or U ] physics specialized. the degree to which a substance prevents the flow of an electric current through it: Copper has (a) low resistance. Fewer examples.
Sep 12, 2022 · The resistivity is a characteristic of the material used to fabricate a wire or other electrical component, whereas the resistance is a characteristic of the wire or component. To calculate the resistance, consider a section of conducting wire with cross-sectional area A, length L, and resistivity .
May 30, 2024 · Resistance is the property of an electric circuit that converts electric energy into heat energy. Learn how resistance is measured in ohms, how it depends on length, area, and material, and how it affects current and voltage.
- The Editors of Encyclopaedia Britannica
Learn what electrical resistance is, how it is measured, and what factors affect it. Find out the difference between resistance and resistivity, and see examples and questions on electrical resistance.
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