[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBLQje_You_KdB7bfzd3mlGRaMySzbXDlN-uOzyjkXTQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-06-02 18:21:21",148045676,[8,9,10,11],"1","2","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F26107966d311ad19581731fbc19d5ecd.webp\">","3",{"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)","对称三相交流电路总功率等于相功率的( )倍",[21,33,41,50,59,68,76,85,94,103],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-06-02 18:21:20",148045656,[26,27,28,29],"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":34,"createTime":23,"id":35,"options":36,"question":40,"source":31,"type":32},[],148045658,[37,38,39],"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":42,"createTime":23,"id":43,"options":44,"question":49,"source":31,"type":32},[],148045660,[45,46,47,48],"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":51,"createTime":23,"id":52,"options":53,"question":58,"source":31,"type":32},[],148045662,[54,55,56,57],"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":60,"createTime":23,"id":61,"options":62,"question":67,"source":31,"type":32},[],148045664,[63,64,65,66],"10A","12.2A","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":69,"createTime":23,"id":70,"options":71,"question":75,"source":31,"type":32},[],148045666,[72,73,64,74],"15.2","8.8A","19A","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",{"answer":77,"createTime":23,"id":78,"options":79,"question":84,"source":31,"type":32},[],148045668,[80,81,82,83],"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":86,"createTime":5,"id":87,"options":88,"question":93,"source":31,"type":32},[],148045670,[89,90,91,92],"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":95,"createTime":5,"id":96,"options":97,"question":102,"source":31,"type":32},[],148045673,[98,99,100,101],"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":104,"createTime":5,"id":6,"options":105,"question":19,"source":31,"type":32},[],[8,9,10,11]]