一、问题的提出干电池在人们的日常生活中扮演着十分重要的角色,如手电筒、遥控器、石英钟等都离不开它。干电池包装说明中指出:新旧干电池不能混用,这是为什么?本文试从实验角度展开定量研究。二、实验探究与分析干电池有两个重要的参量,一是表征将电能转化为其它形式能本领的物理量——电动势E:二是反映电池对电流阻碍作用物理量——内阻r。现选择一节未使用的新电池和已使用一段时间的旧电池 First, the issue put forward Dry batteries in people’s daily lives play a very important role, such as flashlights, remote control, quartz clock and so can not be separated from it. Dry battery packaging instructions that: old and new batteries can not be mixed, which is why? This article from a experimental perspective quantitative research. Second, the experimental exploration and analysis of dry cell batteries have two important parameters, one is the characterization of the electrical energy into other forms can afford the physical quantity - electromotive force E: two is to reflect the battery current obstruction physical quantity - internal resistance r. Now choose a new battery that has not been used and an old one that has been used for a while