[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fgJawis4N_OIaxIwVx5Kl0VUS5SMpw_U4VpH2vjkf-OU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":16,"related":17,"source":27,"type":28},[],"2023-11-09 19:57:47",104734786,[8,9,10,11],"发生转动,同时靠近磁铁","不发生转动,只靠近磁铁","不发生转动,只离开磁铁","发生转动,同时离开磁铁",{"courseId":13,"courseImg":14,"courseName":15},"0fe93bd9f20feca98d681a21e8a025fa","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F25b30343053994e8940089572d36015b.jpg","23-24（1）大学物理Ⅱ","把轻的导线圈用线挂在磁铁N极附近,磁铁的轴线穿过线圈中心,且与线圈在同一平面内,如图所示.当线圈内通以如图所示方向的顺时针电流时,线圈将( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F054c9bb75a3c62d0d99775f3ef241c06.png\">",[18,29,38,47,50,59,68,77,86,95],{"answer":19,"createTime":5,"id":20,"options":21,"question":26,"source":27,"type":28},[],104734779,[22,23,24,25],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc5a5ada29583e0dad58952d55b4f11bd.png\">","0","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F457a8ded2ef625f8c883e608503142a1.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faccad05a111a21d442481eef67ad567d.png\">","两个同心圆线圈,大圆半径为R,通有电流I1;小圆半径为r,通有电流I2,方向如图.若r << R(大线圈在小线圈处产生的磁场近似为均匀磁场),当它们处在同一平面内时小线圈所受磁力矩的大小为( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb69a13a480555b5e5e0588e340889505.png\">","v1",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],104734780,[33,34,35,36],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd8aef347ba49da0f279241cc6855d8f9.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fef8a1e5ba193615e77978f83051e2c89.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa8e5f2be3ba7ec5efd24bdb4b5fdaf49.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F91ec52eebf1c967fa36463039da15063.png\">","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: ()",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],104734784,[42,43,44,45],"1\u002F4倍","2倍","4倍","1\u002F2倍","一带电粒子,垂直射入均匀磁场,如果粒子质量增大到2倍,入射速度增大到2倍,磁场的磁感应强度增大到4倍,则通过粒子运动轨道包围范围内的磁通量增大到原来的()",{"answer":48,"createTime":5,"id":6,"options":49,"question":16,"source":27,"type":28},[],[8,9,10,11],{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":27,"type":28},[],104734787,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0c338c591553ff2dad1b17f2a59e5640.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F855df1efa6100f78a5228d912b888e1b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F52edf1232e37a4b465d476b4b36b3514.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F319d939d6b14a436b241397564e05d6c.png\">","一无限长载流I的导线,中部弯成如图所示的四分之一圆周AB,圆心为O,半径为R,则在O点处的磁感应强度的大小为(). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fae4e8667df6b4ca7d432504eca471887.png\">",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":27,"type":28},[],104734788,[63,64,65,66],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb7596754bf29f45186647917b2a48f22.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2b03950eaddb5f737a5ceb7433887a96.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F86bd73190156e1b23d1ac07495cf7a13.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff0a0fe03dcc206f978cd5e8dc82c4b23.png\">","在磁感应强度为B的均匀磁场中作一半径为r的半球面S,S边线所在平面的法线方向单位矢量n与B的夹角为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6bdbe82f006474fbe9cb5fbc5cb111f8.webp\">,则通过半球面S的磁通量(取弯面向外为正)为( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd59ee18759a2d9ba1255ec3e1a5f9c47.png\">",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":27,"type":28},[],104734789,[72,73,74,75],"2:1","8:1","1:1","4:1","恒定磁场中有一载流圆线圈,若线圈的半径增大一倍,且其中电流减小为原来的一半,磁场强度变为原来的2倍,则该线圈所受的最大磁力矩与原来线圈的最大磁力矩之比为( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":27,"type":28},[],104734791,[81,82,83,84],"BR = 4 Br","BR = 2 Br","2BR = Br","BR = Br","一载有电流I的细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,两螺线管单位长度上的匝数相等.设R = 2r,则两螺线管中的磁感应强度大小BR和Br应满足( )",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":27,"type":28},[],104734793,[90,91,92,93],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff5501cb79c8118574aa9c6b5bc172ed7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fac043dc5852c5075bb43b87939b2a800.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3dfea2b9ae5a2526cb2c3eaaaeaec1af.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F907ee82378b09fdc52e9e5b6fbbb2a54.png\">","一个动量为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff29e17fc9d697e9eb3e910b8be8c0745.png\">的电子,沿图示方向入射并能穿过一个宽度为D、磁感强度为B(方向垂直纸面向外)的均匀磁场区域,则该电子出射方向和入射方向间的夹角为( ). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F49a067cf5c27d72e00444fcd8523c52a.png\">",{"answer":96,"createTime":5,"id":97,"options":98,"question":102,"source":27,"type":28},[],104734794,[99,100,101,23],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0b82867cba26045a974e15d733c210da.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7cb81631197f302c089a7caf8b6609c1.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0a11d63360ca606472cba0b1fb926057.png\">","一长直载流I的导线,中部折成图示一个半径为R的圆,则圆心的磁感应强度大小为(). \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd4cebc02e50bf76db90393ee21f55672.png\">"]