2019中考物理一轮复习17家庭用电真题演练.doc

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1家庭用电中考真题演练1(2014菏泽中考)某家庭电路的部分电路如图所示,其中甲、乙两处分别装用电器和开关。对此电路,下列说法正确的是( )A火线上的保险丝应该改装到零线上B甲处应装用电器,乙处应装开关C当用电器功率增大时,通过保险丝的电流就增大D当保险丝熔断后,可以用铜丝代替2(2018菏泽中考)安全用电越来越被人们所重视,下列符合安全用电要求的是( )A家庭电路中的保险丝可用铜丝代替B多个大功率用电器同时使用一个插座C发现有人触电时,应尽快用手拉开他D更换灯泡时先断开电源3(2017菏泽中考)下列做法中,不符合安全用电要求的是( )A维修用电器时一定要切断电源B有金属外壳的用电器,金属外壳一定要接地C发现有人触电应先救人后断电D为了保证家庭电路安全,尽量不要同时使用多个大功率电器4(2016菏泽中考)下列做法中符合安全用电原则的是( )A使用测电笔辨别火线或零线时,手不能接触笔尾金属体B发现有人触电,立即用手将他拉开C家庭电路中,用电器的开关可以任意安装在火线或零线上D家用电器的金属外壳一定要接地5(2015菏泽中考)下列对生活用电常识的认识中,符合要求的是( )A开关接在火线或零线上都可以,所以家庭电路安装中不需要验电笔2B三脚插头的用电器也可插入两孔插座中使用C使用验电笔时,手不要接触笔尾金属体,以免触电D输电线进入用户后应先接电能表参考答案1C2.D3.C4.D5.D

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