“测定电源的电动势和内阻”是高考的高频考点,也是教学的重点和难点.笔者在讲授2010年第3版的《物理》选修3-1的“实验:测定电源的电动势和内阻”一节时,觉得它的“思考与练习”中,习题3设计的一组实验数据及教参给出的解答与这节的内容不符,如果用它训练学生不仅 “Determination of electromotive force and internal resistance ” is the college entrance examination of high frequency, but also the teaching of the key and difficult.I teach the third edition of 2010 “Physics” elective 3-1 “Experiment: Determination of electromotive force And internal resistance ”, think it “ thinking and practice ”, a set of experimental data designed by Problem 3 and the reference given in the tutorial and the contents of this section does not match, if you use it to train students not only