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如图甲所示电路中理想变压器原、副线圈的匝数比n1：n2＝5：1，D为理想二极管，R1＝50Ω、R2＝100Ω，原线圈输入图乙所示的正弦交变电压，电路中的电流表和电压表均为理想电表，则（ ）
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高三下学期物理《》真题及答案
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一理想变压器原线圈匝数n1＝1100接在电压为220V.的交流电源上当它对11只并联的36V60W.
如图所示理想变压器的副线圈上接有两个灯泡L3L4原线圈与两个灯泡L1L2串联接在交流电源上.若四个灯
如图所示理想变压器原副线圈匝数比n1∶n2=4∶1当导体棒向右匀速切割磁感线时电流表
1的读数是12 mA,则副线圈中电流表A.2的读数应该为( ) A.3 mA
48 mA
0
与R.阻值有关
理想变压器原副线圈的匝数比为10:1原线圈输入电压的变化规律如图甲所示副线圈所接电路如图乙所示P.为
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理想变压器原副线圈的匝数比为101.原线圈输入电压的变化规律如图甲所示副线圈所接电路如图乙所示P.为
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副线圈输出电压的有效值为31V
P向下移动时，原、副线圈的电流都减小
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一台理想变压器原副线圈匝数之比是5∶1则原副线圈两端电压之比为_______这台变压器工作时原副线圈
变压器的原副线圈的匝数分别为n1=100n2=20当原线圈接60V的交流电时则副线圈上的电压U2=_
如图所示理想变压器的原副线圈匝数比n1∶n2＝1∶2原线圈接入110V交流电路中副线圈接有220V4
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一台理想变压器原副线圈匝数之比是5∶1则原副线圈两端电压之比为________这台变压器工作时原副线
如图所示.一理想变压器原线圈的匝数为n1副线圈的匝数为n2原线圈所接电源为交变电流.副线圈上接有一电
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如图3所示理想变压器原副线圈接有相同的灯泡A.B原副线圈的匝数之比为n1∶n2=2∶1交变电源电压为
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理想交流电压表的示数为31V
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如图所示.一理想变压器原线圈的匝数为n1副线圈的匝数为n2原线圈所接电源为交变电流.副线圈上接有一电
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一理想变压器原副线圈匝数比n1∶n2＝11∶5原线圈与正弦交变电源连接输入电压u随时间t的变化规律如
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变压器的输入功率是2.2×103W
在交变电流变化的一个周期内，电阻产生的焦耳热是20J.
一台理想变压器原副线圈的匝数比n1∶n2＝20∶1原线圈接入有效值为220V.的交流电压副线圈向一电
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的示数变小 电流表
的示数变小 电压表
的示数变小 
的示数变小 电流表
的示数变小 电压表
的示数变小 
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