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电场力做功的过程就是电势能转化的过程,电场力做正功,电势能增加,电场力做负功,电势能减少.而对于给定的电荷来说,电场力做功的大小与其运动路径无关,仅与起始和终了位置的电势差有关.理清这三者之间的关系可以较容易地求解这类问
The process of electric field force is the process of the potential energy conversion, the electric field force to do positive work, the potential energy increases, the electric field force to do negative work, the potential energy decreases.For a given charge, the size of the electric field force work has nothing to do with its movement path , Only with the potential difference between the beginning and the end position to sort out the relationship between the three can be easier to solve such questions