[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fqnsFiNMacx1mzBSVdLV-wagYPqly075In4Lx6lVpPQA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":22,"type":23},[],"2025-11-17 14:45:54",235708672,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},26,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_46564826","作业2","铁磁材料被磁化的外因是有 ,内因是有",[17,24,29,32,37,42,47,52,57,65],{"answer":18,"createTime":5,"id":19,"options":20,"question":21,"source":22,"type":23},[],235708670,[],"如果流过导线或者线圈的电流发生变化,电流所产生的 也会发生变化,于是在导线或者线圈由于交链的磁通变化而产生","v1",2,{"answer":25,"createTime":5,"id":26,"options":27,"question":28,"source":22,"type":23},[],235708671,[],"铁心损耗包括 损耗、 损耗两部分损耗,二者合称 损耗",{"answer":30,"createTime":5,"id":6,"options":31,"question":15,"source":22,"type":23},[],[],{"answer":33,"createTime":5,"id":34,"options":35,"question":36,"source":22,"type":23},[],235708673,[],"根据磁滞回线的不同,铁磁材料一般可分为 磁性材料 . 磁性材料 和 磁性材料 三类",{"answer":38,"createTime":5,"id":39,"options":40,"question":41,"source":22,"type":23},[],235708674,[],"变压器的损耗包括 损耗和 损耗",{"answer":43,"createTime":5,"id":44,"options":45,"question":46,"source":22,"type":23},[],235708675,[],"一台单相变压器的容量为 SN=2000VA,一次绕组额定电压为 220V,二次绕组额定电压为 110V,则一次绕组与二次绕组的额定电流分别为 I1N= A,I2N= A",{"answer":48,"createTime":5,"id":49,"options":50,"question":51,"source":22,"type":23},[],235708676,[],"有一台单相变压器,已知 U1=220V,I2=10A,R=10Ω,则 U2= V,I1= A",{"answer":53,"createTime":5,"id":54,"options":55,"question":56,"source":22,"type":23},[],235708677,[],"一台多绕组变压器 ,原绕组额定电压为 220V ,副绕组额定电压分别为 110V、36V、12V,原绕组为 1500 匝,副绕组的匝数分别为 匝、 匝、 匝",{"answer":58,"createTime":5,"id":59,"options":60,"question":63,"source":22,"type":64},[],235708678,[61,62],"正确","错误","在相同条件下,铁心磁导率μ越大,其线圈产生的磁场就越强",3,{"answer":66,"createTime":5,"id":67,"options":68,"question":69,"source":22,"type":64},[],235708679,[61,62],"磁导率μ越大,则表明在相同的磁动势作用下产生的磁场越强,因此在工程上人们总是采用磁导率 μ 尽量大的材料来组成电机、电器及各种磁铁的磁路"]