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在如图所示的闭合铁芯上绕有一组线圈,与滑动变阻器、电池构成闭合电路,a、b、c为三个闭合金属圆环,假定线圈产生的磁场全部集中在铁芯内,则当滑动变阻器的滑片左、右滑动时,能产生感应电流的金属圆环是( )
![](https://img.xintiku.com/upload/b2/f8/b2f8b8db3a27bb8d87bc8f404df3a488.png)
A.a、b两个环
B.b、c两个环
C.a、c两个环
D.a、b、c三个环
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在如图所示的闭合铁芯上绕有一组线圈,与滑动变阻器、电池构成闭合电路,a、b、c为三个闭合金属圆环,假定线圈产生的磁场全部集中在铁芯内,则当滑动变阻器的滑片左、右滑动时,能产生感应电流的金属圆环是( )
![](https://img.xintiku.com/upload/5e/6a/5e6a68cd2df1532ca38e28c0b2d719a9.png)
A.a、b两个环
B.b、c两个环
C.a、c两个环
D.a、b、c三个环
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如图所示的闭合铁芯上绕有一组线圈,与滑动变阻器、电池构成闭合电路,a、b、c为三个闭合金属圆环,假定线圈产生的磁场全部集中在铁芯内,则当滑动变阻器的滑片左、右滑动时,能产生感应电流的金属圆环是( )
![](https://img.xintiku.com/upload/aa/84/aa84c05953b4dcc802bbbe7d779bde64.jpg)
A.a、b两个环 B.b、c两个环
C.a、c两个环 D.a、b、c三个环
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现将电池组,滑动变阻器,带铁芯的线圈A、线圈B,电流计及开关如图连接.某同学如下操作中均发现电流表的指针发生偏转,用法拉第总结的五种引感应电流方法,对产生的原因描述正确的是( )
![](https://img.xintiku.com/upload/04/71/04711004d2044936351d6b2cf4a363f9.png)
A. 闭合与打开开关均发现指针偏转,是变化的电流引起的
B. 闭合开关,线圈A向上拔出与向下插入指针偏转,是运动的恒定电流引起的
C. 闭合开关,线圈A中的铁芯拔出与插入,指针偏转是变化的电流引起的
D. 闭合开关,移动滑动变阻器滑片,指针偏转的原因是运动的恒定电流引起的
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现将电池组、滑动变阻器、带铁芯的线圈A、线圈B、电流计及电键如图连接.下列说法中正确的是( )
![](https://img.xintiku.com/upload/5c/38/5c38ee5cabfd7d191e70c664fa2497da.png)
A.电键闭合后,线圈A插入或拔出都会引起电流计指针偏转
B.线圈A插入线圈B中后,电键闭合和断开的瞬间电流计指针均不会偏转
C.电键闭合后,滑动变阻器的滑片P匀速滑动,会使电流计指针静止在中央零刻度
D.电键闭合后,只有滑动变阻器的滑片P加速滑动,电流计指针才能偏转
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在研究电磁感应现象的实验中,将电池组、滑动变阻器、带铁芯的线圈A、线圈B、电流计及开关如图连接.
(1)在开关闭合、线圈A放在线圈B中的情况下,某同学发现当他将滑动变阻器的滑动端P向左加速滑动时,电流计指针向右偏转.由此可以推断______
(A)线圈A向上拔出或滑动变阻器的滑动端P向右加速滑动,都能引起电流计指针向左偏转;
(B)线圈A中铁芯向上拔出或断开开关,都能引起电流计指针向右偏转;
(C)滑动变阻器的滑动端P匀速向左或匀速向右滑动,电流计指针均静止在中央;
(D)因为线圈A、线圈B的绕线方向未知,故无法判断电流计指针偏转的方向.
(2)将线圈A插入线圈B中,闭合开关的瞬间,线圈B中感应电流与线圈A中电流的绕行方向______(填“相同”或“相反”).
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如图所示的电路可以用来“研究电磁感应现象”.干电池、开关、线圈A、滑动变阻器串联成一个电路,电流计、线圈B串联成另一个电路.线圈A、B套在同一个闭合铁芯上,且它们的匝数足够多.从开关闭合时开始计时,流经电流计的电流大小i随时间t变化的图象是( )
![](https://img.xintiku.com/upload/f8/0d/f80dcc5248b3f7714f1da7d427bec8d7.png)
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAABLCAYAAAAf4PsCAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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AElFTkSuQmCC6I+B5LyY572R
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAF0AAABLCAYAAAAS/otFAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAARrSURBVHhe7ZwvTPwwFMfP8ScIJEGBIzmDRIIj
KMwlSCQ4JI45JBKJJDmDRCKRmEuQSCQSWe7T+zV0Y/u169bd7vqaEHK3rd19+vp9r+32BkpK5wQG
nbcoDapa0D8/P9X9/X0FtrEaDQZqNBaqLgK1oD8+PqqdnR1XnXLcQaAW9JubGzWYWnNZmWRDfUws
3W1ztaCfnJxosB8fHyU1Iy8jJerSMvTd3V0N/fn5+W/N45EaiJm7iU/PqGXpa2trGnqZMx2PRFq8
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Swkn4A2dcHF1dVVDR2akhBPwhv719aVeXl409Pf39/AW5Up/TTesqiZHwtKfgLelC3R/qK4zBbqL
UITjAj0CVFeVAt1FKMJxgR4BqqtKge4iFOG4QI8A1VWlQHcRinBcoEeA6qpSoLsIRTgu0CNAdVUp
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FxcXieP0+/mtQac5Vh9l2dcNvlXoyMvh4aHirQ0p1QRahU4zPMfOpEl2lzqETlMAPzg4UDhYKX8J
tG7ppgmWB5AaLF9KnkA06DQj4MvNLSp0AT8n6AY8zlW2+GadEN3STV8b58obeqmXzqCbcJIdJ/ZY
Uy6dQgc0Eyg2tQkpU5WbzqEbC2fWis6naPVzg25bPSuUKa3ZzBW67WRZLEsFfi+gl8FnqXhZZ7O9
gm7DZ22eB5r4v2wOt5fQDXwiHSyeZydZx0H3F9v6xyrLJt1NjprG5Uyq0H2yK52dnSlyRC7a9uAk
G6kp88WBbncawAGP/NARfO73CJhlZzUpt3otL67RAWgkhw5gBDDbvbu766cPsFIoLjT0YqeQL/Lq
6kr7AEYBj4Yw+erDeo+dQnGpoNudwK4Vz+Kw5IATZmiz9ECnIEfdbifmUyguLfQyaWLpAflBjpiI
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fbaD+ubNSQ0QKIlefh2kWHgcI/kB5VYtSFc9JewAAAAASUVORK5CYILoj4HkvJjnvZE=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFwAAABLCAYAAAD9POB7AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAROSURBVHhe7dwvTPNAGAbwofgTxOSCAkcyg0QO
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AAAAAElFTkSuQmCC6I+B5LyY572R
)
D.
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![](https://img.xintiku.com/upload/93/32/93328da57858e87ec40466da308549d6.png)
现将电池组、滑线变阻器、带铁芯的线圈A、线圈B、电流计及开关如图连接,在开关闭合、线圈A放在线圈B中的情况下,某同学发现当他将滑线变阻器的滑动端P向左加速滑动时,电流计指针向右偏转.由此可以判断( )
A.线圈A向上移动或滑动变阻器滑动端P向右加速滑动,都能引起电流计指针向左偏转
B.线圈A中铁芯向上拔出或断开开关,都能引起电流计指针向右偏转
C.滑动变阻器的滑动端P匀速向左或匀速向右滑动,都能使电流计指针静止在中央
D.因为线圈A、线圈B的绕线方向未知,故无法判断电流计指针偏转的方向
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![](https://img.xintiku.com/upload/66/e9/66e912ee2c4ed60efb5c8b54c586f0fc.png)
现将电池组、滑线变阻器、带铁芯的线圈A、线圈B、电流计及开关如图连接,在开关闭合、线圈A放在线圈B中的情况下,某同学发现当他将滑线变阻器的滑动端P向左加速滑动时,电流计指针向右偏转.由此可以判断( )
A.线圈A向上移动或滑动变阻器滑动端P向右加速滑动,都能引起电流计指针向左偏转
B.线圈A中铁芯向上拔出或断开开关,都能引起电流计指针向右偏转
C.滑动变阻器的滑动端P匀速向左或匀速向右滑动,都能使电流计指针静止在中央
D.因为线圈A、线圈B的绕线方向未知,故无法判断电流计指针偏转的方向
-
![](https://img.xintiku.com/upload/1b/cc/1bcc4389e3b429dc7f88fb44301512a8.png)
现将电池组、滑线变阻器、带铁芯的线圈A、线圈B、电流计及开关如图连接,在开关闭合、线圈A放在线圈B中的情况下,某同学发现当他将滑线变阻器的滑动端P向左加速滑动时,电流计指针向右偏转.由此可以判断( )
A.线圈A向上移动或滑动变阻器滑动端P向右加速滑动,都能引起电流计指针向左偏转
B.线圈A中铁芯向上拔出或断开开关,都能引起电流计指针向右偏转
C.滑动变阻器的滑动端P匀速向左或匀速向右滑动,都能使电流计指针静止在中央
D.因为线圈A、线圈B的绕线方向未知,故无法判断电流计指针偏转的方向