如图为理想变压器,三个灯泡L1、L2、L3都标有“5V,5W”,L4标有“5V,10W”,若它们均正常发光,则变压器原、副线圈匝数比n1∶n2和ab间电压分别为
A.2∶1, 20V | B.2∶1, 25V |
C.1∶2, 25V | D.1∶2, 20V |
相关知识点
如图为理想变压器,三个灯泡L1、L2、L3都标有“5V,5W”,L4标有“5V,10W”,若它们均正常发光,则变压器原、副线圈匝数比n1∶n2和ab间电压分别为
A.2∶1, 20V | B.2∶1, 25V |
C.1∶2, 25V | D.1∶2, 20V |
试题篮
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