问题
问答题
如图所示，画出B点的电场强度的方向和负电荷在A点受到的电场力方向．A、B两点的场强大小为EA______EB，A、B两点的电势高低为φA______φB．
答案
电场线的疏密程度反映了电场强度的大小，所以EA＞EB．
在根据沿电场线的方向，电势降低可知φA＜φB
故答案为：＞＜
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如图所示，画出B点的电场强度的方向和负电荷在A点受到的电场力方向．A、B两点的场强大小为EA______EB，A、B两点的电势高低为φA______φB．
电场线的疏密程度反映了电场强度的大小，所以EA＞EB．
在根据沿电场线的方向，电势降低可知φA＜φB
故答案为：＞＜
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