一、学习目标通过实验复习 ,重新回忆测定电源的电动势和内阻实验的目的、原理、器材和步骤 ,加深对该实验的原理和思想的认识 .能解决测定电源的电动势和内阻及与其相关的一些问题 .二、设计说明对于测电源的电动势和内阻实验 ,在讲授新课的时候已经详细介绍了它的原理并进行 I. Learning Objectives Through experiment review, recall the purpose, principle, equipment and procedures of measuring the electromotive force and internal resistance of the power source, deepen the understanding of the principle and idea of ​​the experiment, and solve the problem of determining the electromotive force and internal resistance of the power source and its correlation with it. Some of the problems. Second, the design description For the test of the electromotive force and internal resistance of the power source, the principles were introduced in detail when the new course was taught and performed.