【判断题】【消耗次数：1】
在互感电路中，直流电流虽产生自感和互感磁通链，但不产生自感和互感电压。
①
正确
②
错误
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相关题目
【单选题】
有两个线圈，线圈1对线圈2的互感系数为M21，而线圈2对线圈1的互感系数为M12。若它们分别流过i1和i2的变化电流且|di1/dt|＜|di2/dt|，并设i2变化在线圈1中产生的互感电动势为ε12，由i1变化在线圈2中产生的互感电动势为ε21，下述论断正确的是：（）
①
M12=M21，21=12
②
M12M21，2112
③
M12=M21，＞21＞12
④
M12=M21，＞21＜12
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①
now that
②
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another
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consists
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the smallest of which
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the smallest of them
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consistent
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【单选题】
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①
medicine I take; and the worse
②
medicine I take; the worse
③
I take medicine; the worse
④
I take medicine; worse