(东营专版)2019年中考物理总复习第十五、十六章电流和电路电压电阻真题演练.doc

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1第十五、十六章真题演练考点一 探究串、并联电路电 压的关系1(2014东 营中考)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”时,小明同学想用图中的器材组成电路,其中一个电压表测量电源两端的电压,一个电压表测量某一个灯泡两端的 电压,请你帮助他完成下述工作(电源电压不超过 3 V)。(1)在方框内画出电路图。(2)用笔画线表示导线,将实物图连成实验电路。(3)正确操作后,测量电源两端电压和灯泡两端电压的两电压表示数分别如图甲、乙所示,则电源两端的电压为_ V,被直接测量的灯泡两端的 电压为_ _V。(4)根据串联电路中 用电器两端的电压与电源 两端电压的关系 得,另一个灯泡两端的电压为_V。参考答案21(1)如 图所示(2)如图所示(3)2.8 1.6 (4)1.2

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