题目内容

通过电磁感应现象可以知道,当导体的切割速度和磁场的磁感应强度一定时,导线的切割长度越长,则导体中的感应电动势()。
A 越小
B 不变
C 越大

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通过电磁感应现象可以知道,导体切割磁力线的运动速度越慢,导体中的感应电动势()。
A 越小
B 不变
C 越大

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