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1990年1月1日起,我国采用的电压单位和电阻单位,将按国际公认值做相应变动,这标志着我国电学单位实物基准的准确可靠达到国际先进水平,同时表明我国电学绝对测量手段也达到国际先进水平。电学计量分为两大类:一类是与电荷有关的,简称电量(如电压、电流、电功率、电解等)。另一类是与元件参数有关的,简称电参量(如电阻、电容、电感等)。这两类单位中,只要有一个进行了绝对测量,其它单位就可以由此导出。电测量中,直流电测量是最基本的部分,交流电量和磁学量都由直流电量所导出。电学中应用最广泛的
From January 1, 1990, the voltage units and resistor units adopted in China will change according to the internationally recognized values, which indicates that the accuracy and reliability of the physical basis of China’s electricity unit has reached the international advanced level, and at the same time shows that China’s absolute measurement method of electricity is also To reach the international advanced level. Electric metering is divided into two major categories: one is related to the charge, referred to as the amount of electricity (such as voltage, current, electric power, electrolysis, etc.). The other is related to component parameters, referred to as electrical parameters (such as resistance, capacitance, inductance, etc.). Of these two types of units, as long as one absolute measurement is performed, other units can be derived therefrom. In the electrical measurement, the direct current measurement is the most basic part, and the alternating current quantity and the magnetic quantity are all derived from the direct current quantity. The most widely used in electricity