如图所示的双线螺线管当开关s闭合时其铁芯ab A．a端为s极b端为n极b．a端为n极b端为s极c．不能被磁化d．无法确定是否被磁化 Sketch Coloring Page

如图所示的双线螺线管当开关s闭合时其铁芯ab A．a端为s极b端为n极b．a端为n极b端为s极c．不能被磁化d．无法确定是否被磁化 Template

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tomski如图所示的双线螺线管当开关s闭合时其铁芯ab a．a端为s极b端为n极b．a端为n极b端为s极c．不能被磁化d．无法确定是否被磁化 coloring

如图所示的双线螺线管当开关S闭合时其铁芯AB A．A端为S极B端为N极B．A端为N极B端为S极C．不能被磁化D．无法确定是否被磁化 sketch template

如图所示，闭合开关后，两个通电螺线管中间的小磁针N极�下指。请你在括号内标出电源的“ ”或“﹣”极，并画出乙通电螺线管的绕线方法。百度教育 sketch template

通电螺线管的NS极如图所示请在图12中括号内标出电源的正负极和小磁针静止时的NS极 ——青夏教育精英家教�—— sketch template

如图所示根据通电线圈的扭转方�在图中画出左边螺线管的绕线方�并标出两个螺线管的NS极和电源的正负极．题目和参考答案——青夏教育精英家教�—— sketch template

如图15 1 15甲乙是两种结构不同的环状螺线管的示意图其中乙是由两个匝数相同互相对称的半圆环形螺线管串联而成的给它们按图示方�通以 sketch template

在制造精密电阻时．常常采用双线绕法．即把电阻丝从螺线管一端绕到另一端再从另一端绕回来如果电流方�如图所示那么 A螺线管左右两端都没 sketch template

如图所示螺线管下有一可自由转动的小磁针闭合开关S小磁针静止时N极指�螺线管的 端填“A 或“B ． A 解析由右手螺旋定则判断出通电 sketch template

图所示电路中请用笔画线代替导线将电路补全．要求将�动变阻器和螺线管组成串联电路闭合开关后螺线管左端为N极且�动变阻器的�片�左移动 sketch template

如图所示当闭合电键S后通电螺线管Q端附�的小磁针N极转�Q端则 A．通电螺线管的Q端为N极电源a端为正极B．通电螺线骨的Q端为N极 sketch template

12．如图所示螺线管B置于闭合�属圆环A的轴线上当B中通过的电流I减小时 A．环A有缩小的趋势 B．环A有扩张的趋势 C．螺线管B有 sketch template

在闭合螺线管线路中的开关S后小磁针的北极指�如图所示画出螺线管的绕线方式．——青夏教育精英家教�—— sketch template

将一螺线管放到洒有均匀铁�的桌面上电路连接情况如图所示则表述正确的是A闭合开关S螺线管左端是N极B闭合开关S铁�变成磁感线说明 sketch template

如图所示的螺线管接入电路中闭合开关后小磁针的N极的指�如图所示请在电路的缺省部分画出电源的正负极．——青夏教育精英家教�—— sketch template

题目内容 如图所示，根据通电螺线管的磁感线方�，可判断通电螺线管左端为 S 极，电源的a端为 正百度教育 sketch template

14．通电螺线管�围的磁感线分布及方�如图所示请标出它的NS极以及电源的正负极．——青夏教育精英家教�—— sketch template

如图所示在开关S由闭合到断开的过程中通电螺线管的磁性强弱和极性将 A增强改变B减弱不变C增强不变D减弱改变题目和参考 sketch template

如图所示当开关闭合后通电螺线管上方的小磁针受力的作用保持静止则通电螺线管的右端是 极电源的右端是 极——青夏教育精英家教�—— sketch template

如图所示闭合开关S后请画出螺线管�围的磁感线分布和标出小磁针的N极．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示开关S闭合后螺线管的a端是 极小磁针将沿时针方�转动．——青夏教育精英家教�—— sketch template

如图所示当开关闭合后通电螺线管上方的小磁针受力的作用保持静止则通电螺线管的右端是 极电源的右端是 极——青夏教育精英家教�—— sketch template

如图所示请根据闭合开关后小磁针的指�标出电源的正极负极通电螺线管的N极和图中磁感线的方�．题目和参考答案——青夏教育精英家教�—— sketch template

制造电阻箱时要用双线绕法如图所示．当电流变化时双线绕组 A．螺旋管内磁场�生变化B．穿过螺旋管的磁通量�生变化C．回路中一定有自感电动势 sketch template

如图所示闭合开关通电螺线管的上端为N极将�动变阻器�片�右�动弹簧将缩短．如果用电流表替代虚线框内仪器然后将条形磁体迅速插入线圈中 sketch template

闭合开关S后小磁针静止时N极指�如下图所示那么图中电源的正极A 一定在a端 B 一定在b端 C 在a端或b端均可 D 无法确定 sketch template

19．如图所示abc三枚小磁针分别放在通电螺线管的正上方管内和右侧当开关闭合时这些小磁针静止时小磁针的N极指�为 A．ab sketch template

如图所示电路当开关K闭合后螺线管的 端为N极．想使螺线管的磁性减弱应该填“插入或“拔出铜塞．题目和参考答案 ——青夏教育精英 sketch template

1用细线悬挂一个重为5N的小球使其在空中�动如图甲所示．在图中画出小球�到A点时受到的重力示意图．2如图乙所示的螺线管接入电路中 sketch template

小波小组在探究“通电螺线管的外部磁场实验中设计了如图1所示电路．实验时1可通过观察判断通电螺线管的磁极．2如图2所示是通电 sketch template

一轮复习：描绘小灯泡伏安特性曲线知乎 sketch template

如图当S闭合时两螺线管之间相互排斥．请标出电源的“ “ 极和左方小磁针静止时的NS极．题目和参考答案——青夏教育精英家教�—— sketch template

如图5所示螺线管置于闭合�属圆环A的轴线上当B中通过的电流减小时 A环A有缩小的趋势B环A有扩张的趋势C螺线管B有缩短的趋势D sketch template

如图所示的电路中甲乙线圈套在同一玻璃棒上能够自由移动当开关S闭合后 A．两个线圈将�左右分开B．两个线圈将�中间靠拢C．两个线圈都 sketch template

如图9所示在弹簧测力计的挂钩下悬挂一个小水桶桶与水的总质量为5kg用细线系一个质量为178 Kg的铜球用手提细线上端将小球缓慢浸没在 sketch template

5．在制作精密电阻时为了消除使用过程中由于电流变化而引起的自感现象采用双线并绕的方法如图所示．其道理是 A．当电路中的电流变化时 sketch template

如图所示螺线管与电流表组成闭合电路条形磁铁位于螺线管上方下端为N极．则当螺线管中产生的感应电流 A．方�与图示方�相同时磁铁靠� sketch template

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