A unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second. 电能单位当电流为安培电阻为欧姆通电时间为秒时所做的功。
A unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second. 电感单位当电路中的电流强度在一秒钟内的变化为一安培产生的电动势为一伏特时电感为一亨利。
A unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second. 电量的实用单位等于电流强度为一安培时一秒钟内通过导体横截面的电量。