SI unit and quantity and denoted by the potential, potential difference and electromotive force.
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The general principle governing the electromotive force in such electrical machines is Faraday's law of induction. The electromotive force symbol is ε. ∴ The unit of emf is volt which is also the unit of potential difference and electric potential.
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The SI derived unit of electric potential is the volt, which is why a difference in electric potential between two points is known as voltage. Older units are rarely used today. Variants of the centimeter gram second system of units included a number of different units for electric potential, including the abvolt and the statvolt.
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