题目列表(包括答案和解析)
某交流发电机的感应电动势与时间的关系,如图A-4所示.如果其他条件不变,仅使线圈的转速加倍,则交流电动势的最大值和周期分别变为()
A.400V,0.02s B.200V,0.02s
C.400V,0.08s D.400V,0.08s
图
A.400 V,0.02 s B.200 V,0.02 s C.400 V,0.04 s D.400 V,0.08 s
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