[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fawkNqpx0AgreXLIDrjkJoE9ix9Dd1PJHU9i2A72-Op4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-09-20 18:04:15",97646579,[8,9,10,11],"ξ =Blv, u = Blv","ξ =Blv, u = 0","ξ =0, u = Blv","ξ =0, u = 0",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},4,"74b5dd55eeb508ee9cb400836c8a49d7","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbf22ac7acca902ba28b39b3e489193cd.png","大学物理(2)","3f04007decaf46899d0a755c12a72808","12.2","如图所示,边长为l的正方形导线框abcd,在磁感应强度为B的匀强磁场中以速度v垂直于bc边在线框平面内平动,磁场方向与线框平面垂直,设整个线框中的总的感应电动势为ξ,bc两点间的电势差为u,则 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F375b91bda510b8e13f0cd97b7eba150c.jpg\">",[21,32,41,44],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],97646574,[25,26,27,28],"电场力","磁场力","洛伦兹力","既有可能是电场力,也有可能是磁场力","产生动生电动势的非静电力是","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],97646576,[36,37,38,39],"(1)有感应电动势,A端为高电势","(2)有感应电动势,B端为高电势","(3)无感应电动势","(4)无感应电动势","如图所示,导线AB在均匀磁场中作下列四种运动,(1)垂直于磁场作平动;(2)绕固定端A作垂直于磁场转动;(3)绕其中心点O作垂直于磁场转动;(4)绕通过中心点O的水平轴作平行于磁场的转动.关于导线AB的感应电动势哪个结论是错误的? \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7dc18d5761dbe3fe59e310a673b4f68c.jpg\">",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],97646581,[48,49,50,51],"线圈中无感应电流","线圈中感应电流为逆时针方向","线圈中感应电流为顺时针方向","线圈中感应电流方向无法确定","如图所示,一根无限长平行直导线载有电流I,一矩形线圈位于导线平面内沿垂直于载流导线方向以恒定速率运动,则 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F27014a5815c812d40e8d10d6ea07f10d.jpg\">"]