[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fXSA1xHYWqGD3tGGuUf9rHwBh7RNoTW2Z8mY-hM-PhwA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-05-10 21:28:50",4811460,[8,9,10,11],"方向相同, 大小相等","方向不同,大小不等","方向相同, 大小不等","方向不同,大小相等",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"2b8d45f5e0d1f6bcaa81b30dfcd6b304","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F94b406d2261bf8a2521be4f6f12fe907.png","大学物理A1","30bab7daf3de404e8a45815177855e7c","毕奥萨法尔 磁感应强度计算测试","一圆电流在其环绕的平面内各点的磁感应强度",[21,26,35,44,53,61,70,79,88,97],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],4811461,[30,31,32,33],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2a4c31dbe90f297113613b7b26170381.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe10dc3dd8ec1bf1a6e70c045de388ca8.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1e8fb2ba75f07f0c4c61599f44cebbe7.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6ee5984998d1e041555c41fd8a34d75c.webp\">","电流由长直导线流入一电阻均匀分布的金属矩形框架,再从长直导线流出,设图中O1,O2,O3处的磁感应强度为B1,B2,B3则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5cd14e571dfd2e385f29984f6ad0fc2b.png\">",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],4811462,[39,40,41,42],"0","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2102113ec0728b9ab6816ce781a4240c.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc00e095b335c9ecbd2ff80112b4e4e6b.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbc4e08660f6244610772a5bc9f33a17e.webp\">","如图两个半径为R的相同的金属环在a、b两点接触 (a, b连线为环直径), 并相互垂直放置,电流I由a端流入, b端出,则环中心O点的磁感应强度大小为:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb5816b282cc1b037991a5a52866dd103.png\">",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],4811463,[48,49,50,51],"在OYZ平面,与Y, Z成450","在OXY平面,与XY成450","在OXZ平面,与X, Z成450","在OXZ平面,与Y, Z成300","如图所示,XOY和XOZ平面与一个球心位于O点的球面相交,在得到的两个圆形交线上分别流有强度相同的电流,其流向各与y轴和z轴的正方向成右手螺旋关系,则由此形成的磁场在O点的方向为: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd63db496ec54abb9228464cc867379f6.png\">",{"answer":54,"createTime":5,"id":55,"options":56,"question":60,"source":24,"type":25},[],4811464,[57,58,39,59],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7eb3089cd9481a009e4c3b3d070ba354.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F92ee01d5b05cefc7b497250a5bf15fb9.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa4e6c8119f126207db257b0d755b9564.webp\">","在真空中,电流由长直导线l沿底边ac方向经a经流入一电阻均匀分布的正三角形线框,再由b点沿平行底边ac方向从三角形框流出,经长直导线2返回电源(如图), 已知直导线的电流强度为I, 三角形框的每一边长为L, 求正三角形中心O处的磁感应强度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0402d0512836bb0f2e5f2b84ebd874a3.png\">",{"answer":62,"createTime":5,"id":63,"options":64,"question":69,"source":24,"type":25},[],4811465,[65,66,67,68],"30°","60°","120°","210°","两根长直导线,分别在A、B两点垂直穿过纸面,两导线通有方向相反大小分别为1A和2A的电流,如图示,试问:在与A点相距为d,与B点相距为2d的P点处,磁场方向与+X轴的夹角是( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6094fc9b3b0b0b25bf44dcd2c9ad69be.jpg\">",{"answer":71,"createTime":5,"id":72,"options":73,"question":78,"source":24,"type":25},[],4811466,[74,75,76,77],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe207408e5608a44f9d439622c8c2d3cd.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F750b378dfa4317321998b2c65dec1cf7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a89deb94af91a383c5a6e27625189d5.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F19dd4d066a8244dfbf54f5c68f862e55.png\">","在球面上竖直和水平的两个圆中,通过相等电流,电流方向如图所示,则球心处的磁感应强度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff8b7f71ba5ded087525aadc1c374648.png\">的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F26f3af148ebebf60a3c0c1e71c8c4868.png\">",{"answer":80,"createTime":5,"id":81,"options":82,"question":87,"source":24,"type":25},[],4811467,[83,84,85,86],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe1f5efae3417ccf2c0ab9b0eee6dd04b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5840a7da71aa0e48cf4af3b4704590bf.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe7305049444e44b10bd395a0d9790e1e.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a4f6432c36cd96db4957196face6403.png\">","两无限长直载流导线垂直而不相交,其间最近距离为d,电流强度分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F18937b74b24d4c0e60297f401e112ff2.png\">和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9261805adf7f74c89a43869a143b9621.png\">,P点到两导线的距离都是d,如图所示,则P点的磁感应强度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff8b7f71ba5ded087525aadc1c374648.png\">的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c0ab02c4ec5ea99f6ee289e300e6fbe.png\">",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":24,"type":25},[],4811468,[92,93,94,95],"沿-x轴","沿+x轴","沿+y轴","沿-y轴","在磁场中电流元\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4a43bb08c959bed7e853db52428ec895.png\">沿直角坐标系的x轴正方向放置时受到的磁场力为零,而当电流元转到沿y轴正方向放置时,它受到的磁场力沿z轴负方向,则该处磁感应强度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fff8b7f71ba5ded087525aadc1c374648.png\">的方向为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7b2e3d54b73de6a0939d16ab1aa6595.png\">",{"answer":98,"createTime":5,"id":99,"options":100,"question":105,"source":24,"type":25},[],4811469,[101,102,103,104],"方向竖直向下,1\u002F2(B1+B2)","方向竖直向上,1\u002F2(B1+B2)","方向竖直向下,1\u002F2(B1-B2)","方向竖直向上,1\u002F2(B1-B2)","将一电流均匀分布的无限大载流平面放入磁感强度为B0 的均匀磁场中,电流方向与磁场垂直,放入后,平面两侧磁场的磁感强度分别为 B1和 B2,如下图所示,则 B0的大小和方向为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6547f98a7817d1a8349a704da081a102.jpg\">"]