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

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

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

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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

中考物理考点解读：通电螺线管的磁场知乎 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

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

如图所示，用弹簧挂一条形磁铁放在螺线管的正上方，闭合开关，待弹簧稳定后，将�动变阻器的�片缓慢�左移动，下列说法正确的是（） A 电压表示 sketch template

通电螺线管要点解读知乎 sketch template

请在图中通电螺线管的NS极．——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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

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

题目如图所示闭合开关通电螺线管的上端为极将�动变阻器�片�右�动弹簧将．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

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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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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根据通过螺线管的电流情况标出通电螺线管的NS极——青夏教育精英家教�—— sketch template

如图所示开关S闭合�现弹簧缩短小磁针旋转到如图中所示位置静止则下列说法正确的是 A 电源右端是负极B 小磁针上端是S极C sketch template

通电螺线管要点解读知乎 sketch template

图中闭合开关S后通电螺线管与磁极间的磁感线形状如图所示在图中用箭头标明磁感线的方�并用“ “一号标出电源的正负极．题目和参考 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

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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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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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

中考物理考点解读：通电螺线管的磁场知乎 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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

1．如图所示通电螺线管置于闭合�属环A的轴线上A环在螺线管的正中间当螺线管中的电流逐渐减小时 A．A环有收缩的趋势 ——青夏教育 sketch template

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