[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBqyi3a4UoIIkaCSGZiQDCZo-1tbIkaGedtB2p2M431I":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-04-29 22:27:54",185289909,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fffbabcbf22c219267ecd891a5761743f.png\">,方向向里","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faa93133a5db1d503b2b464b818dd9bd7.png\">,方向向里","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fffbabcbf22c219267ecd891a5761743f.png\">,方向向外","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faa93133a5db1d503b2b464b818dd9bd7.png\">,方向向外",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},11,"924b5184e4d236205eeacafe9aca7683","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa9cc03e414ed7091637ede79aa6f9c18.jpg","2024秋学期 普通物理学（二）","work_43095255","坚持总体国家安全观","若通电流为I的导线弯成如图所示的形状(两边直线部分伸向无限远),则O点(虚线的中点)的磁感强度大小B= ;磁感强度B的方向为 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb9221bd8acc915c22c5badac71bf85fe.png\">",[21,32,41,49,58,67,76,85,88,97],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],185289902,[25,26,27,28],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5f7db6cc14a731ab759174ad5067ca90.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3da8af8776beb341b28bf542334d5792.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbc73ed4637e5a00751f3f807282e4bab.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F24162ca9f9e2d70abb297fa586d2e2bb.png\">","载有电流I的直导线在某处弯成一半径为R半圆环,则环心处的磁感应强度为: [ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa1ba3a66b7f34437ecf5b9b9ac637ada.png\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],185289903,[36,37,38,39],"0","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9e79c26b056d252052eff9d80f3df74f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25ee7ecf700b80e17205add63d728e45.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc4da60a4fd113969f23a611818f9d6f9.png\">","如图所示,在载流螺线管的外面环绕闭合路径一周积分\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd1df4c8cf8c692745c93a83f9aa126e1.png\">等于[ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe9d3a9d0d0f8fffea81515f689be4f20.png\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":48,"source":30,"type":31},[],185289904,[45,46,36,47],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8df70c5af71bb8da02aeabe5a6fca8f0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F55b560d66130b8a2a9906fd9a6d4ec1a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff70185b103885dea2c821bd56f26198.png\">","四条互相平行的长直载流导线,横截面是一个正四边形,边长为a,相对两顶点的电流同方向,强度皆为I,则在正方形中心处的磁感应强度为[ ]",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":30,"type":31},[],185289905,[53,54,55,56],"若闭合环路内未包围传导电流,则环路上各点的B必为零","若闭合环路上B皆为零,则环路包围的空间内必处处没有电流","穿过任意闭合环路的磁通量可以不等于零","穿过任意闭合曲面的磁通量均为零","下列说法中正确是[ ]",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":30,"type":31},[],185289906,[62,63,64,65],"沿电流方向偏转","沿电流的反方向偏转","不偏转","垂直于电流方向偏转","一电子垂直射向一载有稳恒电流的直导线,则该电子在磁场作用下将 [ ]",{"answer":68,"createTime":5,"id":69,"options":70,"question":75,"source":30,"type":31},[],185289907,[71,72,73,74],"磁力相等,且均为零,最大磁力矩相等","磁力相等,但不为零,最大磁力矩不相等","磁力不相等,最大磁力矩相等","磁力不相等,最大磁力矩不相等","在均匀磁场中放置两个面积相等而且通有相同电流的线圈,一个是三角形,另一个是矩形,则两者所受到的[ ]",{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":30,"type":31},[],185289908,[80,81,82,83],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f825fbbfbbaf3881a7cbdd38a0ca7b5.png\">方向向里","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbdf0893fc292ebac04cd3de950105932.png\">方向向里","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f825fbbfbbaf3881a7cbdd38a0ca7b5.png\">方向向外","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbdf0893fc292ebac04cd3de950105932.png\">方向向外","无限长载流直线折成图示状,电流强度为I,A点在PO延长线上,且距O为a,则A点的磁感应强度大小为B= ;方向为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F010e025e4bd3009b7c0eda5b05c56cf1.png\">",{"answer":86,"createTime":5,"id":6,"options":87,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":30,"type":31},[],185289910,[92,93,94,95],"F= BIR ,方向为向下,合力大小为 4BIR","F= 2BIR ,方向为向下,合力大小为 3BIR","F= BIR ,方向为向上,合力大小为 2BIR","F= 2BIR ,方向为向上,合力大小为 4BIR","如图所示,载有电流I的直导线某处弯成一半径为R半圆环,两直线部分长度均为R,此导线处于垂于纸面向里均匀磁场中,则此导线圆环部分受力大小为F= ,方向为 .整个导线受合力大小为 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6de156a25774bd40da8431e8c6381271.png\">",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":30,"type":31},[],185289911,[101,102,103,104],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6b25e03f6bf4a842ff1608deb0f37a88.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8b5896ceaba0b057d7fbf1edba836e53.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5ff262d6440bff6bd5fcd762f30c3b66.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbdd83fd481d3f4051958b7c6998bc85e.png\">","半径为R,载有电流I的刚性圆形线圈,在图示均匀磁场中,电流的磁矩大小为 ,它在磁场中受到的力矩大小为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7945777ef959c99e55dd1768871c69e2.png\">"]