|Ampere (A): multiples and submultiples|
The ampere is often shortened to amp (plural amps).
Definition of the ampere states that is defined by taking the fixed numerical value of the elementary charge e to be 1.602176634×10⁻¹⁹ when expressed in the unit C
1 ampere = 1 siemens volt
1 ampere = 1 volt/ohm
1 ampere = 1 watt/volt
1 ampere = 1 weber/henry