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farad : ウィキペディア英語版
farad

The farad (symbol: F) is the SI derived unit of electrical capacitance, the ability of a body to store an electrical charge. It is named after the English physicist Michael Faraday.
== Definition ==
One farad is defined as the capacitance of a capacitor across which, when charged with one coulomb of electricity, there is a potential difference of one volt. Conversely, it is the capacitance which, when charged to a potential difference of one volt, carries a charge of one coulomb. A coulomb is equal to the amount of charge (electrons) produced by a current of one ampere (A) flowing for one second. For example, the voltage across the two terminals of a 2 F capacitor will increase linearly by 1 V when a current of 2 A flows through it for 1 second.
For most applications, the farad is an impractically large unit of capacitance. Most electrical and electronic applications are covered by the following SI prefixes:
* 1 mF (millifarad, one thousandth () of a farad) =  μF =  nF
* 1 μF (microfarad, one millionth () of a farad) =  nF =  pF
* 1 nF (nanofarad, one billionth () of a farad) =  pF
* 1 pF (picofarad, one trillionth () of a farad)

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「farad」の詳細全文を読む



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