a、b为电场中的两点,且a点电势低于b点,则可知(    )A.把负电

a、b为电场中的两点,且a点电势低于b点,则可知(    )

A.把负电荷从a点移到b点电场力做负功,电势能增加

B.把正电荷从a点移到b点电场力做正功,电势能减少

C.无论移动的是正电荷还是负电荷,电荷的电势能都要减少

D.以上说法都不对

答案

D

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