“电表内阻的测量”的教学中,除了实验原理的探究和实验器材的选取以及实验方法的确定与实验误差的分析以外,半偏法测量电阻可以引导学生进行以下发散性思维,以期培养学生的创新能力、应用能力,培养良好思维品质。电压表、电流表是测量电压和电流的常用仪表,对其内阻的测量通常采用一种较为简便的方法—— In addition to the experimental principle of research and experimental equipment selection and experimental methods to determine the experimental error and analysis of the error, the measurement of resistance can guide the students to conduct the following divergent thinking, with a view to Develop students’ ability to innovate, apply and cultivate good thinking quality. Voltmeter, ammeter is a common instrument for measuring voltage and current, the internal resistance of the measurement is usually used a more simple method -