[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fyiT7IKdxNdv6tjCmGLb15nhsyZkV3hIVFpMQGSzqhhc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-06-27 17:48:10",156012184,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F70225fe9cc92c972514c0cfcf059a75e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffd02fdb995e51ab1947e5d989d452d75.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffa344b7f2e1a310b17d9967f6e71b08c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe3dea787ab639e0bc67801cb191e234a.png\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},6,"d1086047906bff00f6afb636ace227f6","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcec5b56832d1691f16be0c7bece0c41e.jpg","大学物理A上-2024春季学期","work_35570009","2024春+第七章安培环路定理洛伦兹力","如图所示,流出纸面的电流为2I,流进纸面的电流为I,则下述式中哪一个是正确的 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F654a92ef7dfb3b6515bf156f511a9d4a.png\">",[21,32,41,50,59,62],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],156012180,[25,26,27,28],"回路L内的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7d4d94ca7dacf9113ffdadb6722bab2.png\">不变,L上各点的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7ac05ef9b8d6e469a87b27ff387bfca.png\">不变","回路L内的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7d4d94ca7dacf9113ffdadb6722bab2.png\">不变,L上各点的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7ac05ef9b8d6e469a87b27ff387bfca.png\">改变","回路L内的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7d4d94ca7dacf9113ffdadb6722bab2.png\">改变,L上各点的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7ac05ef9b8d6e469a87b27ff387bfca.png\">不变","回路L内的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7d4d94ca7dacf9113ffdadb6722bab2.png\">改变,L上各点的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc7ac05ef9b8d6e469a87b27ff387bfca.png\">改变","取一闭合积分回路L,使三根载流导线穿过它所围成的面.现改变三根导线之间的相互间隔,但不越出积分回路,则( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],156012181,[36,37,38,39],"BR=2Br","BR=Br","2BR=Br","BR=4Br","一载有电流I的导线分别均匀密绕在半径为R和r的长直圆筒上形成两个螺线管(R=2r),两螺线管单位长度上的匝数相等,两螺线管中的磁感应强度大小BR和Br应满足()",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],156012182,[45,46,47,48],"只有正方形的平面载流线圈,外磁场的合力才为零","只有圆形的平面载流线圈,外磁场的合力才为零","任意形状的平面载流线圈,外磁场的合力和力矩一定为零","任意形状的平面载流线圈,外磁场的合力一定为零,但力矩不一定为零","一平面载流线圈置于均匀磁场中,下列说法正确的是( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],156012183,[54,55,56,57],"不动","靠近导线AB","离开导线AB","发生转动,同时靠近导线AB","把轻的长方形线圈用细线挂在载流直导线AB的附近,两者在同一平面内,直导线AB固定,线圈可以活动,当长方形线圈通以如图所示的电流时,线圈将( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F16415789776089a6ec1dee7486c4d435.png\">",{"answer":60,"createTime":5,"id":6,"options":61,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],156012185,[66,67,68,69],"RA∶RB=2,TA∶TB=2","RA∶RB=0.5,TA∶TB=1","RA∶RB=1,TA∶TB=0.5","RA∶RB=2,TA∶TB=1","A、B两个电子都垂直于磁场方向射入一均匀磁场而作圆周运动.A电子的速率是B电子速率的两倍.设RA,RB分别为A电子与B电子的轨道半径;TA,TB 分别为它们各自的周期.则( )"]