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Derived Units

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All other units are derived from the seven fundamental units. These derived units generally have their own names and those commonly encountered in electrical circuits are summarized in the table, together with the physical quantities to which they relate.

If you find the exponent notation shown in the table a little confusing, just remember that V^-1 is simply 1/V, s^-1 is 1/s, m^-2 is 1/m², and so on.

Quantity	Derived	Abbreviation	Equivalent unit
Capacitance	Farad	F	A s V-1
Charge	Coulomb	C	A s
Energy	Joule	J	N m
Force	Newton	N	kg m s-2
Frequency	Hertz	Hz	s-1
Inductance	Henry	H	V s A-1
Magnetic Flux	Weber	Wb	V s
Potential	Volt	V	N m s-1 A-1
Power	Watt	W	N m s-1
Resistance	Ohm	Ω	V A-1

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