|  | Ampere (A): multiples and submultiples | 
|  | Simbol: A 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 | 
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