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电功与电热的区别和联系

更新时间: 2020-07-14 00:00:00     

电功是电流做的功,也就是消耗了多少电能。电热是电流通过电阻类用电器发的热,只是把电能转化成热能,如果整个电路中只有电阻类用电器,这时电流做的功全部转化成热能,即此时电功与电热相同;当不是纯电阻电路时,电功大于电热,根据能量守恒定律,一部分电功要转化为其他能量,比如有发动机时,转化为动能。

关键词: 电热 区别 联系

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