在中学物理中,测定电源电动势和内阻的方法有多种,可以用一只电压表和一只电流表,也可以用一只电流表和一只电阻箱,或者用一只电压表和一只电阻箱,它们的测量原理都是闭合电路欧姆定律.但由于电表有内阻,以上方法都存在一定的系统误差,误差的情况并不一样,下面就这几种测定方法 In the middle school physics, there are several ways to measure the power EMF and internal resistance. You can use a voltmeter and an ammeter, or use an ammeter and a resistor box, or use a voltmeter and a resistor. Box, their measurement principle is closed circuit Ohm’s law. But because of the internal resistance of the meter, there are certain systematic errors in the above methods, the error situation is not the same, the following several methods of measurement