老师，怎样判断电势的大小呢 电势能的大小判断
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在高中阶段,一般用:沿电场线方向,电势逐渐减小来判断.
电势能=电势* ,这个是要带正负的,在电势高的地方放上负电荷,电势为负,所以正电势的地方有负电荷的话电荷量越高,电势能越小,正电势的地方有正电荷的话电荷量越高,电势能越大
另外还有些判断方法:
离场源正电荷越近,试验正电荷的电势能越大,试验负电荷的电势能越小
离场源负电荷越近,试验正电荷的电势能越小,试验负电荷的电势能越大
无论正,负电荷,电场力做正功,电势能减小.电场力做负功,电势能增大.
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