题目内容
某交流发电机产生的感应电动势与时间的关系如图所示,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为( )
A.400V,0.02s
B.200V,0.02s
C.400V,0.04s
D.400V,0.08s
答案:B
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题目内容
某交流发电机产生的感应电动势与时间的关系如图所示,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为( )
A.400V,0.02s
B.200V,0.02s
C.400V,0.04s
D.400V,0.08s