一根粗细均匀的导线，两端加上电压u时，通过导线中的电流强度为i，若将导线均匀拉长，使它的横截面半径变为原来的三分之一，再给它两端加上电压u，则（ Sketch Coloring Page

一根粗细均匀的导线，两端加上电压u时，通过导线中的电流强度为i，若将导线均匀拉长，使它的横截面半径变为原来的三分之一，再给它两端加上电压u，则（ Template

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tomski一根粗细均匀的导线，两端加上电压u时，通过导线中的电流强度为i，若将导线均匀拉长，使它的横截面半径变为原来的三分之一，再给它两端加上电压u，则（ coloring

一根粗细均匀的导线，两端加上电压U时，通过导线中的电流强度为I，若将导线均匀拉长，使它的横截面半径变为原来的三分之一，再给它两端加上电压U，则（ sketch template

一根圆柱状导体加上电压U后导体中电流为I若将导体均匀拉长至截面积半径为原来的再加上电压U求此时的电流 题目和参考答案——青夏教育精英 sketch template

有一根粗细不均匀的导线己知粗细端横截面积之比为21当有电流通过这一导线时通过粗端的电流I粗与通过细端的电流I细的关系是 A．I粗 sketch template

在测定一根粗细均匀合�丝Rx的电阻率的实验中待测合�丝Rx的电阻约为5Ω．提供的仪器有A．电压表V内阻约为10kΩ量程为3VB．电流 sketch template

一根粗细均匀的�属导线其电阻值为R将其剪成相等的两段后再进行并联则并联后的电阻值为 A 2R B R C D 题目和参考答案 sketch template

如图一圈粗细均匀的导线长s在两端点AB间加上恒定电压时测得通过导线的电流为IA如剪去BC段在AC两端加同样电压时通过导线的电流 sketch template

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题目将一根粗细均匀的铁丝截去一段后不变的物理量是 A重力B质量C体积D密度题目和参考答案——青夏教育精英家教�—— sketch template

有一根粗细均匀的�属电阻线．1用螺旋测微器测直径时示数如图1所示读数为 Mm．2其电阻Rx可用如图2甲所示的电路测量．所给器材中 sketch template

题目小华家有一只仅能看清“ 03A 字样的小灯泡为了探究通过小灯泡的电流与两端电压的关系他利用身边的实验器材设计了如图所示的实验 sketch template

如图在一根横跨河流两岸的硬�料管内穿有三根完全相同的电线．为了辨别哪两个线头为同一根导线的两端可以用图示的测通器来测试其操作过程如下 sketch template

两根粗细和长短都相同的铜导线和镍铬合�线串联起来接入电路中则 A．通过铜导线的电流大电压也大B．通过两导线的电流一样大镍铬合线两端的 sketch template

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12．粗细均匀的直导线ab的两端悬挂在两 根相同的弹簧下边ab恰好处在水平位置．已知ab的质量为m＝10 G长度L＝60 Cm沿水平 sketch template

�学家�现两根平行导线通电后有如图所示的现象图中实线虚线分别表示通电前后的情况．1由图可知两平行通电导线之间有力的作用．当通入的 sketch template

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实验室里将一根粗细均匀的铜导线减去一半那么剩下部分与原来比较电阻将 A 不变 B 变大 C 变小 D 不能判定题目和参考答案 sketch template

干货关于等效电路图画法，不得不学的几个小窍门！知乎 sketch template

用均匀的电阻丝围成的正方形导线框ABCD如图所示．若分别将AB两端和AC两端接在同一个电源两端则两次通过BC的电流之比为 ．——青夏 sketch template

小明取一根粗细均匀的饮料吸管在其下端塞入适量�属丝并用石蜡封口制成简易密度计．现使吸管竖直漂浮在不同液体中测量出液面到吸管下端的深度为h sketch template

小华用图1所示的电路探究“通过电阻的电流跟两端电压的关系图2是小华未完成连接的实验电路．1若选用两节新干电池串联作电源要求�动变阻器 sketch template

如图所示用两根相同的细绳水平悬挂一段均匀载流直导线MN电流I方�从M到N绳子的拉力均为F为使F＝0可能达到要求的方法是 A．加 sketch template

如图所示将一根粗细均匀的电阻丝弯成一上闭合的圆环接入电路中电路与圆环的O点固定P为与圆环良好接触的�动头闭合开关S在�动头P缓慢地 sketch template

一根粗细均匀的�属导线其电阻值为R将其剪成相等的两段后再进行并联则并联后的电阻值为 A 2R B R C D 题目和参考答案 sketch template

如图所示把一根包有绝缘层的导线绕在铁钉上把导线两端的绝缘层刮去接上干电池后铁钉 A有磁性 B会熔化 C有电流流过 D两端 sketch template

一段粗细均匀的电阻丝电阻值为16Ω将它围成一个封闭的圆圈如图所示则AB两点间的电阻为3Ω．为探究串联电路电压规律小敏将该段电阻丝分成 sketch template

利用图甲电路测量某电池的内阻其中AB为一段粗细均匀的铅笔芯笔芯上套有一�属�环P宽度和电阻不计与笔芯良好接触并可只有移动．实验器材 sketch template

一根粗细均匀阻值为8Ω的电阻丝在温度不变的情况下先将它等分成四段每段电阻为再将这四段电阻丝并联并联后总电阻为则与的大小依次为A sketch template

题目如图所示一根质量分布均匀的木棒能绕O处转轴自由转动．现有拉力F1始终水平方�拉力F2始终与杆垂直和拉力F3始终竖直�上分别作用 sketch template

如图所示方�水平的匀强磁场B中一根粗细均匀的通电导体置于水平桌面上电流方�与磁场方�垂直．此时导体对桌面有压力．要使导体对桌面的压力为 sketch template

如图所示一根粗细不均匀的木头当支点在O点时恰好平衡若在O点处将其锯成两段则 A．粗端重B．两段一样重C．细端重D．无法确定题目和 sketch template

小明取一根粗细均匀的饮料吸管在其下端塞入适量�属丝并用石蜡封口制成简易密度计．现使吸管竖直漂浮在不同液体中测量出液面到吸管下端的深度为h sketch template

如图甲将一根粗细均匀的木棒放在水平地面上稍微抬起一端至�用力100N则木棒的重力约是 N．图乙则是一根粗细不均匀的木棒若稍微抬起一端 sketch template

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