如图所示将一玩具电动机用导线通过开关电流表接到电池上．闭合开关s后下列说法正确的是 A．电动机在启动过程中电流表的示数先变大后变小 Sketch Coloring Page

如图所示将一玩具电动机用导线通过开关电流表接到电池上．闭合开关s后下列说法正确的是 A．电动机在启动过程中电流表的示数先变大后变小 Template

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tomski如图所示将一玩具电动机用导线通过开关电流表接到电池上．闭合开关s后下列说法正确的是 a．电动机在启动过程中电流表的示数先变大后变小 coloring

如图所示将一玩具电动机用导线通过开关电流表接到电池上．闭合开关S后下列说法正确的是 A．电动机在启动过程中电流表的示数先变大后变小 sketch template

在探究通电导线在磁场中的受力方�与什么有关系时一位同学做了如图abc的三个实验．图中AB表示闭合电路的一部分导线导线上的箭头表示电流的 sketch template

如图所示是理�用的电吹风的典型电路其中电热丝通电后可以�热电动机通电后可以送风选择开关在图示的位置是送风此时电动机跟电热丝是 联 sketch template

如图所示为早期制作的�电机及电动机的示意图A盘和B盘分别是两个可绕固定转轴转动的铜盘用导线将A盘的中心和B盘的边缘连接起来用另一根导线 sketch template

如图所示一直流电动机与阻值9Ω的电阻串联接入电路己知电源电动势E=20V内阻r=1Ω用理想电压表测出电动机两端电压为10V已知电动机 sketch template

题目如图甲所示闭合开关S当�动变阻器�片P�右移动的过程中电流表的示数将 电压表V1的示数将 电压表V2的示数将 将电压表V2 sketch template

15．将电阻R1和R2如图甲所示接在变压器上变压器原线圈接在电压恒为U的交流电源上R1和R2上的电功率之比为21若其他条件不变只 sketch template

一轮复习：描绘小灯泡伏安特性曲线知乎 sketch template

如图所示的电路中电源电压保持不变．当�动变阻器的�片P�右�动时 电流表和电压表的示数变化情况是 A．电流表和电压表的示数都变大 sketch template

中考物理考点解读：通电螺线管的磁场知乎 sketch template

18．小明利用如图12甲所示电路来探究通过导体的电流跟其两端电压及其电阻的关系 1在探究电流与电压的关系时应保持不变分析表中的 sketch template

如图所示一只玩具电动机用一节干电池供电闭合开关S后�现电动机转速较慢经验测电动机性能完好用电压表测a与b间电压只有06V断开 sketch template

如图甲所示是小明“探究电流与电压、电阻的关系”的实验电路图。选用的实验器材是：电源3V、电流表（00 6A）、出卷� sketch template

如图是小华同学探究“电流与电压关系”的电路图。 sketch template

小敏用如图甲所示的电路图研究通过导体的电流与导体电阻的关系电源电压恒为6V改变电阻R的阻值调节�动变阻器�片保持R两端的电压不变记 sketch template

如图所示电源电动势E=15V内电阻r=25Ω小灯泡标有“6V6W 可看做是纯电阻．微型电动机D的内阻r′=05Ω开始电键K1 sketch template

百度教育 sketch template

如图所示的电路图是用来研究通过导体的电流跟导体电阻关系的，其中R1与R2为阻值不同的定值电阻，第一次实验用的定值电阻为R1 ， 闭合开关后，记 sketch template

如图所示利用小型�电机给工厂中的电动机和灯泡供电�电机的输出功率为1kw输电电压为250V�电机与工厂之间距离为为400m�电机与工厂 sketch template

如图所示的电路中123456为连接点的标号．在开关闭合后�现小灯泡不亮．现用多用电表检查电路故障需要检测的有电源开关小 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

33．如图为电磁继电器自动报警电磁继电器的衔铁端部有可控制的触点双�属片是在受热膨胀时自动接通电路的装置要求做到起火后能通过电铃报警请 sketch template

根据如图甲所示的电路图将图乙中的各元件连接起来若开关S闭合后通过电流表的电流为0 8A通过灯L1的电流为0 5A则电流表的示数应是 sketch template

如图所示的电路中电源电压保持不变R为定值电阻当开关闭合时标有“6V 3W 的小灯泡L恰好正常�光若保持R不变将L换成另一只标有 sketch template

题目如图所示电流表量程为0 06A电压表量程为0 15V电阻R0=30Ω电路两端电压恒为U=24V当�动变阻器接入电路的电阻 sketch template

如图所示的电路中，电源电压保持不变。闭合开关S后，�片P从b端移动到a端的过程，电压表示数U与电流表示数I的关系图像如图所示。下列说法正确的是（ sketch template

6．如图是某兴趣小组设计的一恒温箱的原理图．“控制电路由热敏电阻R1�动变阻器R0电磁铁电源U1U1=8V开关导线等组成．热敏 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甲所示电路，电源电压恒为6V，�动变阻器R的规格为“25Ω、1A”，电流表量程选择“0∼06A”，电压表量程选择“0∼3V”，小灯泡上标 sketch template

如右图所示电路中电源电压保持不变闭合开关S后将�动变阻器R2的�片P�右移动在此过程中 A．电压表V1示数不变电压表V2示数变大B sketch template

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 sketch template

如图所示的电路中电源电动势E=6V内阻r=1Ω电阻R1=6ΩR2=5ΩR3=3Ω电容器的电容C=2×10 5F若将开关S闭合 sketch template

2009年北京丰台区高三上学期期末．如图所示电源电动势为E=10V内阻r=1ΩR1=3ΩR2=6ΩC=30μF开关S断开时 sketch template

如图所示电路在电源电压恒定的情况下将�动变阻器的�片P从左�右�动在此过程中下列说法正确的是 A．电压表电流表的示数均变大 B．电压表 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

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