| Revision as of 02:03, 12 July 2002 editPeterlin~enwiki (talk | contribs)1,202 editsm From most wanted. | Revision as of 02:07, 12 July 2002 edit undoPeterlin~enwiki (talk | contribs)1,202 edits Link to resistivity.Next edit → | ||
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| '''Electrical resistance''' is the ratio of the ] across an electric component (such as ]) to the ] passing through it. It is thus a measure of the component's opposition to the flow of ]. Usually denoted by symbol ''R''. The ] unit for electrical resistance is ]. Its ] quantity is ]. | '''Electrical resistance''' is the ratio of the ] across an electric component (such as ]) to the ] passing through it. It is thus a measure of the component's opposition to the flow of ]. Usually denoted by symbol ''R''. The ] unit for electrical resistance is ]. Its ] quantity is ]. | ||
| Specific electrical resistance, a measure of material's ability to oppose the flow of ] is known as ]. | |||
Revision as of 02:07, 12 July 2002
Electrical resistance is the ratio of the potential difference across an electric component (such as resistor) to the current passing through it. It is thus a measure of the component's opposition to the flow of electric charge. Usually denoted by symbol R. The SI unit for electrical resistance is ohm. Its reciprocal quantity is electric conductance.
Specific electrical resistance, a measure of material's ability to oppose the flow of electric current is known as electrical resistivity.