如图所示,电场中有两点A、B,则下列说法正确的是(    ) A.电势

如图所示,电场中有两点A、B,则下列说法正确的是(    )

A.电势φA>φB,场强EA>EB

B.电势φA>φB,场强EA<EB

C.将正电荷q从A移到B电场力做正功

D.将负电荷q从A移到B时,电势能εA>εB

答案

BC

解析:沿着电场线方向电势降低,电场线密集的地方场强大,可知B对.由εP=qφP知正电荷在A点的电势能大于在B点的电势能,所以C对.将负电荷从A移到B的过程中,电场力做负功,电势能增加,故D错.

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