[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fY3gccqh6FMD6OnVqo0zeGdoxl-ZjQSHFyRMxClrg8sE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2024-01-09 01:14:41",127552524,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbe8c974ed4ce9f91220aad684c20c220.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa001a1c16a06b24a227b8be582dff291.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F95ed18f9b3e202d948bec0ad6e7563fb.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7d92cf34ff55a851c53f4d7966dab6fb.png\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},52,"f449e35fa690db4028ec2b508b6be9d4","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71366f857481918a9ba317f9c0a555f1.jpg","大学物理（下）","work_31629063","稳恒磁场(一)单元测验","边长为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F49b08e8e371e18d63627e9d5fc4d5f29.png\"> 的正方形的四个角上固定有四个电量均为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4fa00e13a77ccc8fb6fa4a2497863ee5.png\">的的点电荷.此正方形以角速度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7e7e1d2cde5c9cf7fe1a3116ca2efae9.png\">绕其对角线旋转时,在正方形中心\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffadd8e1fe2c4952cae01da5f261570f4.png\">点产生的磁感强度大小为 【 】",[21,33,43,53,56,65,75,84,93,103],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2024-01-09 00:32:21",127552514,[26,27,28,29],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5b3c85ef2d554002b2dac07524e05740.png\">方向垂直平面向外","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5b3c85ef2d554002b2dac07524e05740.png\">方向垂直平面向里","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F184f6519084b461d22fa137627b7b45c.png\">方向垂直平面向里","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F184f6519084b461d22fa137627b7b45c.png\">方向垂直平面向外","将导线弯成两个半径分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3bce4474ccb142f86f13b9a0d0769c48.webp\"> 和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F19134de32a213e9c4c87208448801480.webp\"> 且共面的两个半圆,圆心为 O ,通过的电流为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd95b41b0132546d36f772e78e1837d0c.webp\"> ,如图所示.则圆心O 点的磁感应强度为( ) \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F004e5f90aa4cabb4f84f0df4afe630bf.png\">","v1",0,{"answer":34,"createTime":35,"id":36,"options":37,"question":42,"source":31,"type":32},[],"2024-01-08 23:03:53",127552517,[38,39,40,41],"磁感强度沿闭合回路的积分为零时,回路上各点的磁感强度必定为零","磁感强度沿闭合回路的积分不为零时,回路上任意一点的磁感强度都不可能为零","闭合回路上各点磁感强度都为零时,回路内一定没有电流穿过","闭合回路上各点磁感强度都为零时,回路内穿过电流的代数和必定为零","下列说法正确的是",{"answer":44,"createTime":45,"id":46,"options":47,"question":52,"source":31,"type":32},[],"2024-01-09 00:32:22",127552521,[48,49,50,51],"磁感应强度的数值跟通电导线的电流I成反比","磁感应强度的数值跟通电导线的长度L成反比","磁感应强度的数值跟通电导线受到的磁场力F的大小成正比","磁感应强度是表示磁场强弱的物理量,它是客观存在的,它与外加导线的长度、电流的强弱和受力情况均无关","有人根据公式B=F\u002FIL提出以下看法,其中正确的是",{"answer":54,"createTime":5,"id":6,"options":55,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":57,"createTime":5,"id":58,"options":59,"question":64,"source":31,"type":32},[],127552526,[60,61,62,63],"0.6 T","6×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4e6d912d19a9c37cb2fa709a14b0c077.webp\"> T","3×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F24880f05e0b6f4f402cf8e770dc24fed.webp\"> T","1.9×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6122f92cb146f02ee78a89e5a9bd2459.webp\">T","距一根载有电流为3×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc1c25e0017b2ebd9626ee4bc51ebb067.webp\"> A的电线1 m处的磁感强度的大小为 (已知真空的磁导率\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9fb921437304491a4081ee58c1b38137.webp\"> T·m\u002FA)",{"answer":66,"createTime":67,"id":68,"options":69,"question":74,"source":31,"type":32},[],"2024-01-08 23:13:58",127552531,[70,71,72,73],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1fb153057939a84e40b443a890034e2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F486ab1925c50b4b3541ac4081f163d0a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff4b570fb41c68dd0cdee0e7dfa8c3834.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5553d5a0a539db097dedac059ad9aeb8.png\">","对于安培环路定理的正确理解是",{"answer":76,"createTime":35,"id":77,"options":78,"question":83,"source":31,"type":32},[],127552536,[79,80,81,82],"磁场是为了解释磁极间相互作用而人为规定的","磁极与磁极间是直接发生作用的","磁场只有在磁极与磁极、磁极与电流发生作用时才产生","磁场和电场一样,是客观存在的物质","下列关于磁场的说法中正确的是",{"answer":85,"createTime":45,"id":86,"options":87,"question":92,"source":31,"type":32},[],127552540,[88,89,90,91],"不能用安培环路定理来计算","只能用毕奥-萨伐尔定律求出","可以用安培环路定理和磁感强度的叠加原理求出","可以直接用安培环路定理求出","若空间存在两根无限长直载流导线,空间的磁场分布就不具有简单的对称性,则该磁场分布",{"answer":94,"createTime":95,"id":96,"options":97,"question":102,"source":31,"type":32},[],"2024-01-09 01:14:40",127552545,[98,99,100,101],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc2d85fba3f4c8639c70d0173aab77221.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb6d92bace44dd5de2caad3e2fae38372.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4f7c36333dc70ca438376a09ce44d7a7.png\">","0","两个载有相等电流 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd95b41b0132546d36f772e78e1837d0c.webp\"> 的圆线圈,一个处于水平位置,一个处于竖直位置, 如图所示.在圆心O 处的磁感应强度的大小为( ) \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F20f97ba6006866a3bfbfa0855a4cfd1b.png\">",{"answer":104,"createTime":105,"id":106,"options":107,"question":112,"source":31,"type":32},[],"2024-01-09 00:29:34",127552551,[108,109,110,111],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee735b952926e19c7cec61185c396819.png\">不变,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F448b06d0604e435fb519e78b86e2416f.png\">增大","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee735b952926e19c7cec61185c396819.png\">增大,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F448b06d0604e435fb519e78b86e2416f.png\">不变","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee735b952926e19c7cec61185c396819.png\">、\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F448b06d0604e435fb519e78b86e2416f.png\">均不变","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee735b952926e19c7cec61185c396819.png\">、\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F448b06d0604e435fb519e78b86e2416f.png\">均增大","如图3所示,在无限长载流直导线附近做一个球形闭合曲面\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fec6cbabf6b0648ff4ef5a2f2e4c2787e.png\">,当球面\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fec6cbabf6b0648ff4ef5a2f2e4c2787e.png\">向着长直导线靠近时,穿过球面\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fec6cbabf6b0648ff4ef5a2f2e4c2787e.png\">的磁通量\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee735b952926e19c7cec61185c396819.png\">和面上各点的磁感应强度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F448b06d0604e435fb519e78b86e2416f.png\">的大小将 【 】\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3ef6dbbf84aef4007b302e9a51aa38df.png\">"]