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伏特:简称伏。符号是V,是电压(U)的单位。安培:简称安。符号是A,是电流(I)的单位。瓦特:简称瓦。符号是W,是电功率(P)的单位。1瓦特=1焦耳/秒欧姆:简称欧。符号是Ω,是电阻(R)的单位。焦耳:简称焦,符号是J,是热量、能量和功的国际单位。1焦耳=1牛顿米=1瓦特秒帕斯卡:简称帕。单位是Pa,符号是P,是压强的单位。欧姆定律指出电压、电流和电阻三者之间的关系为I=U/R,亦即R=U/I,P=UI.
Volts: V for short. The symbol is V, which is the unit of voltage (U). Ampere: referred to as security. The symbol is A, which is the unit of current (I). Watts: for short. The symbol is W, which is the unit of electric power (P). 1 watt = 1 joule / second ohm: short for Europe. The symbol is Ω and is the unit of resistance (R). Joule: short coke, the symbol is J, is an international unit of calories, energy and work. 1 Joule = 1 Newton meter = 1 Watt seconds Pascal: Short for Pa. Unit is Pa, the symbol is P, is the unit of pressure. Ohm’s law states that the relationship between voltage, current, and resistance is I = U / R, that is, R = U / I, P = UI.