试题与答案

下面说法中正确的是:() A.电荷在某处不受电场力的作用,则该处电场强度为零 B

题型:选择题

题目:

下面说法中正确的是:(    )

A.电荷在某处不受电场力的作用,则该处电场强度为零

B.一小段通电导线在某处不受磁场力的作用,则该处磁感应强度一定为零

C.表征电场中某点电场的强弱,是把一个检验电荷放在该点时受到的电场力与检验电荷本身电荷量的比值

D.表征磁场中某点的磁场的强弱,是把一小段通电导线放在该点时受到的磁场力与该段导线的长度和电流乘积的比值

答案:

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