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 Coloring Page

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 Template

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tomski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 coloring

中考物理考点解读：通电螺线管的磁场知乎 sketch template

中考物理考点解读：通电螺线管的磁场知乎 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

中考物理考点解读：通电螺线管的磁场知乎 sketch template

中考物理考点解读：通电螺线管的磁场知乎 sketch template

中考物理考点解读：通电螺线管的磁场知乎 sketch template

4． 如图所示，闭合开关使螺线管通电，A螺线管的上端相当于磁体的N极，可以观察到左边弹簧伸长，右边弹簧缩短．（后两空选填“伸长”、“不变”或 sketch template

1．如图1所示当闭合开关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．通电螺线管 sketch template

在“探究通电螺线管外部磁场 的实验中a B1将螺线管连接到如图a示电路中闭合开关后将螺线管靠�大头针�现此现象说明 sketch template

如图所示电路当开关K闭合后螺线管的aa端为N极．想使螺线管的磁性减弱应该拔出拔出铜塞．题目和参考答案——青夏教育精英家教�—— sketch template

如图1所示闭合开关通电螺线管的上端为S极将�动变阻器�片�右�动弹簧将伸长．如果用灵敏电流计替代虚线框内仪器然后将条形磁体迅速插入 sketch template

开关S闭合后小磁针静止时的指�如图所示由此可知端是通电螺线管的N极 端是电源的正极．题目和参考答案——青夏教育精英家教�—— sketch template

如图所示开关闭合后螺线管通电产生磁场位于螺线管右则的小磁针会�生偏转．请画出通电螺线管的NS极并用箭头在小磁针N极的下方标出其转动的 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一通电螺线管放在闭合�属线圈内螺线管的中轴线正好和线圈的一条直径MN重合若要使线圈中产生顺时针方�的感应电流可采用的方法是A sketch template

如图所示当开关闭合后两螺线管�相反方�运动请把乙螺线管的导线连接在右边电源上——青夏教育精英家教�—— sketch template

通电螺线管要点解读知乎 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

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

通电螺线管要点解读知乎 sketch template

如图所示闭合开关S通电螺线管右侧的小磁针静止时小磁针的N极指�左则电源的右端为 极若要使通电螺线管的磁性增强�动变阻器的�片P应� 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

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

中考物理考点解读：通电螺线管的磁场知乎 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

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

如图所示闭合开关�现铁钉旁边的小磁针静止时S极指�铁钉A端请你在原图上画出电磁铁AB的磁感线标出电磁铁AB的NS极标出蓄电池的正负 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

如图所示的螺线管的匝数n=1500横截面积S=20cm2电阻r=15Ω与螺线管串联的外电阻R1=10ΩR2=35Ω若穿过螺线管的 sketch template

如图所示电路开关S1闭合后S2的断开与闭合使电流表A2的两次示数之比为35由此可知R1与R2的阻值之比为23S2断开再闭合的过程 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

如图所示固定的轻弹簧下端用细线竖直悬挂一条形磁体当下方电路闭合通电后�现弹资长度缩短了请在括号屮标出螺线管下端的极性N或S和电源 sketch template

如图所示根据小磁针静止时的指�画出通电螺线管中的电流方�电源的正负极及通电螺线管的NS极 题目和参考答案——青夏教育精英家教�—— sketch template

如图所示通电螺线管�围的小磁针静止时小磁针N极指�正确的是 A．abcB．abdC．acdD．bcd 题目和参考答案 sketch template

在如图所示的电路中电源电压保持不变电阻R1 的阻值为20Ω闭合开关S电流表A1的示数为03A电流表A 的示数为05A．求1 sketch template

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