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

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圈粗细均匀的导线长1200m在两端点AB间加上恒定电压时测得通过导线的电流05A如剪去BC段在AC两端加同样电压时通过导线的 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

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

11种不同类型导线连接，你的接法都正确么芯线绝缘层铜芯 sketch template

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

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

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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旋度（关于无穷长和有限长通电直导线感应磁场的讨论）知乎 sketch template

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如图所示，一根半径为R的无限长直铜导线，载有电流I，电流均匀分布在导线的横截面上。在导线内部通过中心轴作一横切面S，则通过横切面S上每单位长度 sketch template

取一根粗细均匀的铁丝在它的中点用线悬挂起来铁丝恰好平衡．如果把其右半段对折起来A．右端�下沉B．左端�下沉C．仍然保持水平平衡D．不能确定 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

如图所示将一根粗细均匀的电阻丝弯成一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缓慢地由 sketch template

两根通电的长直导线平行放置电流分别为I1和I2电流的方�如图8 1 10 所示在与导线垂直的平面上有abcd四点其中ab在导线 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

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

如图所示将一根粗细均匀的电阻丝弯成一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缓慢地由 sketch template

小明要测量一段粗细均匀的�属丝的直径．她将这段�属丝一圈圈紧密绕在铅笔杆在用刻度尺测量线圈的长度如图所示她测量的线圈的长度是1001 sketch template

如图所示两根导线沿半径方�引�铁环上的两点并在很远处与电源相连。已知圆环的粗细均匀求环中心的磁感应强度。百度教育 sketch template

3．有一根粗细均匀两端封闭的玻璃管管内封闭着空气被一段水银柱分为A和B两部分现将AB两段空气柱同时降低相同的温度若把玻璃管与水平面成 sketch template

如图4所示当开关S闭合时灯L1L2均不亮某同学用一根导线探究其故障当把导线并接在灯L1两端时�现灯L2亮灯L1不亮当把导线并接在 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

在研究“导体电阻的大小与哪些因素有关 的实验时将一根粗细均匀的导体截成两段后分别接入电路中如图所示则这是用来研究 A 导体电阻与横 sketch template

某段导体两端的电压是12V通过它的电流是3A则它的电阻为 Ω若这段导体两端电压为0V则通过它的电流为 A它的阻值是 ΩA．36 sketch template

题目在“探究串联电路中用电器两端的电压与电源两端电压的关系 的实验中1如图所示连接电路时开关要实验中应选择规格选填“相同 sketch template

如图所示质量为mA=2kg的物块A静止在倾角为37°的斜面底端由跨过光�小定�轮的轻绳与质量为mB=3kg的物块B相连轻绳拉直时用手托住 sketch template

将一根铜导线接在电路中要使导线电阻变大下列说法正确的是 A．将铜导线对折后接入电路B．增大导线两端的电压或增大电流C．用长度横截面积 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

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