[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fW46GkAP4NJ6h2c9fLuhriiXK92ro3OM1BMvEaqCqdlI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-06-02 18:21:20",148045666,[8,9,10,11],"15.2","8.8A","12.2A","19A",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},45,"a81ac8980fb1259078eb0c36b218f7e6","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd84406a83427a3906b137c11733f1236.jpg","电路与磁路（第12期）","exam_124282899","2023供轨《电路与磁路2》(三相电路)","有一对称三相电路,负载做星形连接时线电压UL为380V,每相负载阻抗为电阻R=20Ω与感抗XL=15Ω串联,负载的相电流Iph为",[21,32,40,49,58,66,69,78,88,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],148045656,[25,26,27,28],"30°","120°","60°","-60°","在负载为三角形接线的三相对称电路中,线电流和相电流之间的夹角等于( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":39,"source":30,"type":31},[],148045658,[36,37,38],"600","240","60","电源开路电压为120V,短路电流为2A,则负载从该电源获得的最大功率是( )W",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":30,"type":31},[],148045660,[44,45,46,47],"差1\u002F\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F376b3a838f84f9398fb4a132eb3efccb.webp\">倍","差3倍","差\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F376b3a838f84f9398fb4a132eb3efccb.webp\">倍","相等","有一个三相电动机.当绕组连接成星形接于380V的三线电源上,绕组连成三角形接于Ul=220V的三相电源上.这两种情况下,电源输入功率( )",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":30,"type":31},[],148045662,[53,54,55,56],"代表三相电路的总和","代表所测相的","代表所测两相的总和","不代表任一相","用两只单相功率表测量三相三线制电路有功功率时,每一只功率表的读数()功率,两只功率表读数的代数和代表三相电路的总功率",{"answer":59,"createTime":5,"id":60,"options":61,"question":65,"source":30,"type":31},[],148045664,[62,10,63,64],"10A","14.4A","11.5A","有一对称三相正弦交流电路,负载为星型连接时,线电压为380V,每相负载阻抗为10Ω电阻与15Ω感抗串接,则每相负载相电流是( )",{"answer":67,"createTime":5,"id":6,"options":68,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":70,"createTime":5,"id":71,"options":72,"question":77,"source":30,"type":31},[],148045668,[73,74,75,76],"A,D","B,C","A,B","C,D","戴维南定理说明一个线性有源二端网络可等效为 和内阻 连接来表示.(A. 短路电流Isc B. 开路电压Uoc C.串联 D.并联)",{"answer":79,"createTime":80,"id":81,"options":82,"question":87,"source":30,"type":31},[],"2024-06-02 18:21:21",148045670,[83,84,85,86],"外电路短路","电源内阻为零","外电路断路","外电路上电流比较小","用电压表测得电路的端电压为零,这说明( )",{"answer":89,"createTime":80,"id":90,"options":91,"question":96,"source":30,"type":31},[],148045673,[92,93,94,95],"0.64","0.753","0.765","0.54","一台容量为1000kVA的变压器,24小时的有功电量为15360kwh,功率因数为0.85,该变压器24小时的利用率为( )",{"answer":98,"createTime":80,"id":99,"options":100,"question":105,"source":30,"type":31},[],148045676,[101,102,103,104],"1","2","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F26107966d311ad19581731fbc19d5ecd.webp\">","3","对称三相交流电路总功率等于相功率的( )倍"]