在电学教学和实验中教师往往强调新旧电池不能混用.有不少同学就打破砂锅问(纹)到底.新旧电池为什么不能混用?这时教师如果补充讲解一下电池内阻的概念就既满足了学生的好奇心培养学生多思善问的精神又使学生对串 In the teaching and experiment of electricity, teachers often emphasize that old and new batteries cannot be mixed. There are many students who break the casserole to ask in the end. Why can’t the old and new batteries be mixed? At this time, if the teacher explains the concept of battery resistance, it will satisfy the students. The curiosity cultivates the student’s spirit of thinking and asking students to make