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

题目张华同学在“探究通过导体的电流与其两端电压的关系 时将记录的实验数据通过整理作出了如图所示的图像根据图像下列说法错误的是 A sketch template

题目abcd是一个用粗细均匀的电阻丝围成的正方形单匝线框边长为L每边电阻为R匀强磁场与线框面垂直如图所示磁感应强度大小为B线框 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

某同学想粗测一下粗细均匀的某�属导线的电阻率他先用螺旋测微器测出该导线的直径为d=0200mm然后用刻度尺测出导线的长度为10× 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

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

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

弱电工程线缆导线常用连接方法知乎 sketch template

如图所示，电源电压恒为18V，定值电阻R1=20Ω，�动变阻器R2标有“40Ω 05A”，电流表A的量程为006A，电压表量程为0 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

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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

麦克斯韦方程组——电与磁的统一知乎 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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

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

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

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

导体两端的电压是4V时通过导体的电流是05A导体的电阻是 Ω若导体两端的电压为8V导体中的电流是 A若导体两端不加电压导体的电阻 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

如图所示是一根同材料长度相同粗细不同的导线较细部分的横截面积为S1较粗部分的横截面积为S2则电流通过导线时 A．加在S1两端电压 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

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

题目一粗细均匀的U形管ABCD的A端封闭D端与大气相通．用水银将一定质量的理想气体封闭在U形管的AB一侧并将两端�下竖直放置如图所示 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

在一个导体两端加上3V的电压时通过电流是02A此时导体的电阻是 Ω若在它的两端加上45V的电压这里导体的电阻是 Ω——青夏教育 sketch template

高中物理通电导线在磁场中受到的力 电流 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

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

如图所示的实物电路中有两根导线尚未连接用笔画线代替导线将电路连接完整．要求两灯串联电压表只测灯L2两端的电压导线不能交叉不考�电压 sketch template

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