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Jul 11, 2021 · Resistance (also known as ohmic resistance or electrical resistance) is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). The larger resistance, the greater the barrier against the flow of current.
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Learn what electrical resistance is, how it depends on various factors, and how to measure it. Find out the difference between resistance and resistivity, and see examples and questions on electrical resistance.
- 3 min
Learn how resistance is measured in ohms and how it affects current flow in conductors and insulators. Find out how to use Ohm's Law to calculate resistance and troubleshoot circuits.
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.
May 30, 2024 · 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 affects the flow of electrons, the formula for calculating resistance, and the types of conductors and superconductors.
- The Editors of Encyclopaedia Britannica
Electrical resistance is the hindrance to the flow of charge through an electric circuit. The amount of resistance in a wire depends upon the material the wire is made of, the length of the wire, and the cross-sectional area of the wire.
Resistance is the property of a material or component that opposes the flow of electric current through it. It is measured in Ohms and depends on factors such as material properties, geometry, and temperature. Learn more about resistance, resistivity, conductance, and types of materials.
