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金坛市第二中学

电能表和电功. 周 斌. 金坛市第二中学. 活动:探究影响电流做功多少的因素. 问题:电流做功多少可能与哪些因素有关?. 猜想:电流做功多少可能与 、 、 有关. 用电器两端的电压. 通过用电器的电流. 通电的时间. 控制变量法. 实验思想方法: 。. 活动:探究影响电流做功多少的因素. 制定实验计划、设计实验电路 , 进行实验、收集证据:. 总结归纳:. 若加在用电器两端的电压为 U ,通过用电器的电流为 Ι ,通电时间为 t ,则电流所做的功. Ι. W=. U. t. =. s. 1. J. 1. V. A.

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金坛市第二中学

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  1. 电能表和电功 周 斌 金坛市第二中学

  2. 活动:探究影响电流做功多少的因素 问题:电流做功多少可能与哪些因素有关? 猜想:电流做功多少可能与、 、有关 用电器两端的电压 通过用电器的电流 通电的时间 控制变量法 实验思想方法:。

  3. 活动:探究影响电流做功多少的因素 制定实验计划、设计实验电路,进行实验、收集证据:

  4. 总结归纳: 若加在用电器两端的电压为U,通过用电器的电流为Ι,通电时间为t,则电流所做的功 Ι W= U t = s 1 J 1 V A

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