名校
1 . 图甲为半波整流电路,在理想变压器的输出电路中有一只整流二极管,其具有单向导电性。原、副线圈的匝数比为
,电阻
,原线圈的输入电压随时间的变化关系如图乙所示,电表均为理想交流电表,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3407dcd0e695d2f6e1cfac0a99c4f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5a6ea26f0aa0491df7d4ce234d11d5.png)
A.电压表V1、V2读数相同 |
B.电压表V2的读数为20V |
C.电流表A读数为2A |
D.原线圈的输入功率为20W |
您最近一年使用:0次
2024-04-24更新
|
486次组卷
|
2卷引用:2024届吉林省通榆县实验中学校高三下学期二模物理试题
名校
2 . 如图甲所示,理想变压器原、副线圈匝数比
,V为理想交流电表,灯泡电阻
,AB两端所接交变电流如图乙所示。下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/454b6c66-5ba8-4d62-a3f7-20d90980132a.png?resizew=428)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dec9d37d9c485cafa8303e44ca68afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff05c9e02c83badfd519f8a49f3ac534.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/454b6c66-5ba8-4d62-a3f7-20d90980132a.png?resizew=428)
A.电流频率为100Hz |
B.V的读数为18V |
C.![]() |
D.变压器输入功率为81W |
您最近一年使用:0次
2022-07-13更新
|
265次组卷
|
7卷引用:吉林省白城市通榆县高中2022-2023学年高二上学期期末联合考试物理试题
名校
3 . 在如图甲所示的电路中,理想变压器原线圈输入电压的变化规律如图乙所示(正弦曲线),定值电阻
、
、
的阻值分别为
、
、
,各电表均为理想电表。电压表的示数为
,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763179649998848/2763507116425216/STEM/b403ccfa-0608-4ada-bfb9-747448e71252.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763179649998848/2763507116425216/STEM/aa9c2f18-004d-420e-86b1-c5c352bc8ce8.png?resizew=303)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2c4640b2bee411935f588fc5433c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78aa8e890d2ac882e0fe79598811777a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4de49b9b4621a90d07ea99ae6c1cc75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849ecaa9c400085a3339118893fb26bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85c0092a7b13a43997f08295adb08ad.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763179649998848/2763507116425216/STEM/b403ccfa-0608-4ada-bfb9-747448e71252.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763179649998848/2763507116425216/STEM/aa9c2f18-004d-420e-86b1-c5c352bc8ce8.png?resizew=303)
A.变压器原副线圈的匝数比为![]() | B.电流表A1的示数为![]() |
C.电流表A2的示数为![]() | D.电流表A2的示数为![]() |
您最近一年使用:0次
2021-07-13更新
|
228次组卷
|
3卷引用:2021届吉林省白城市第一中学高三下学期质量检测理综物理试题
名校
4 . 如图1所示,理想变压器原、副线圈的匝数比为
,保险丝的电阻为
,熔断电流为2A。若原线圈接入如图2所示的正弦交流电,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460519937613824/2460655693905920/STEM/6b6a154a-747a-4abe-bdc7-c809b5376b2e.png?resizew=311)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ce8b6c57cd7757c769b7607437349a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c26611f3be42190e60a40165cfa6af7.png)
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460519937613824/2460655693905920/STEM/6b6a154a-747a-4abe-bdc7-c809b5376b2e.png?resizew=311)
A.副线圈中交变电流的频率为5Hz |
B.为了安全,滑动变阻器接入电路的最小阻值为![]() |
C.电压表的示数为10V |
D.将滑动变阻器的滑片向下移动,电压表和电流表A1的示数均增大 |
您最近一年使用:0次
2020-05-11更新
|
187次组卷
|
7卷引用:吉林省白城市通榆县第一中学2019-2020学年高二下学期网络期中物理试题
5 . 如图甲所示,一理想变压器给一个小灯泡供电.当原线圈输入如图乙所示的交变电压时,额定电压为U0的小灯泡恰好正常发光,已知灯泡的电阻为R,图中电压表为理想电表.下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/4/24/2189259998715904/2190067540795392/STEM/083ef05c-e42d-40fe-aa16-48e56f00aff0.png?resizew=444)
![](https://img.xkw.com/dksih/QBM/2019/4/24/2189259998715904/2190067540795392/STEM/083ef05c-e42d-40fe-aa16-48e56f00aff0.png?resizew=444)
A.变压器输入电压的瞬时值为u=Umsin(![]() |
B.电压表的示数为![]() |
C.变压器的输入功率为![]() |
D.变压器的匝数比为Um∶ U0 |
您最近一年使用:0次