题目:
如图所示,理想变压器原线圈接u=220sin100πt (V)的 正弦交流电源,图中电流表内阻不计.副线圈接入“110V,60W”灯泡一只,且灯光正常发光.下列说法正确的是( ) A.电流表的示数为3/11 A B.通过灯泡的电流的频率为50Hz C.电流表的示数为3/22 A D.理想变压器原、副线圈匝数之比为2:1 |
答案:
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