[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fcO45-uKMnnAtKb45WG66PiUz2MnBxcqdI9IoTA9Psfk":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-05-07 21:59:38",141977544,[8,9,10,11],"半径为R的均匀带电球面","半径为R的均匀带电球体","半径为R、电荷体密度为ρ=Ar (A为常数)的非均匀带电球体","半径为R、电荷体密度为ρ=A\u002Fr (A为常数)的非均匀带电球体",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},22,"37823667fc44920c1f5f9c8d8647ea36","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F59d71c300dff6ba7fa49e1ad37a4ae2d.jpg","大学物理A（上）2023-2024（2）","work_34822230","","如图所示,为具有球对称性分布的静电场的E~r关系曲线.该静电场是由下列哪种带电体产生的:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0c1cab8d9ef3b65cbbb1d603ac440247.png\">",[21,32,41,50,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],141977541,[25,26,27,28],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F440eaefe9dd1268294306de87e19a3aa.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8f5b381fada6aa72bbd14f8c531d8b98.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F702b343edc762a2626fa7c63b0822b6d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fefb3afe51d04f8c5df0972cb71a2c34e.png\">","电荷面密度均为+\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F031b6cb559fea5c8f0c7095f3603ddf0.png\">的两块"无限大"均匀带电的平行平板如图放置,则A、B、C三个区域的电场强度分别为(设方向向右为正):\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc607fc71176265d99f35c4c35f42847d.jpg\">","v1",1,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],141977542,[36,37,38,39],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fac28f51841bca5a87d7d8a96665db7e4.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb1a0af7d1eaaa2f79db144ee35f8e7de.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe79efe1ba5fb5250291ff4ddfad8d5da.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6ff674984bcf273aa146d980d66f8e88.png\">","有一边长为a的正方形平面,在其中垂线上距中心O点a\u002F2处,有一电荷为q的正点电荷,如图所示,则通过该平面的电场强度通量为:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdcb0484313a0c531cfccac0f392761a6.jpg\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],141977543,[45,46,47,48],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5191531d71862ef1263e7cfb139e05c2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F556ce1eb8a5d97ebaf0928da0ee9f2c6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3d72b79e9e1a0df0c61bd3b063b2006.png\">","0","一电场强度为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7bae1734d22e770bf84a7ef509fb127e.png\">的均匀电场,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7bae1734d22e770bf84a7ef509fb127e.png\">的方向与沿x轴正向,如图所示.则通过图中一半径为R的半球面的电场强度通量为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F54c238364aefbd40ee273abafb0a5974.jpg\">",{"answer":51,"createTime":5,"id":6,"options":52,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],141977545,[57,58,59,60],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F766982be6e462eb74f1c91b2f3ef1273.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff33e3b7519c45555d9b2ae991f8c5d7c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa71c36e3d17229d21b2b27bbb8449823.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9a4d1109f85cfb1d0f6280a512a5fcc5.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5ff7d94d57b5085c9fc67978e1fde108.png\">在点电荷+q的电场中,若取图中P点处为电势零点 , 则M点的电势为",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],141977546,[66,67,68,69],"E=0,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7da91d8c886a13eba5bb528893ee169.png\">","E=0,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F46e6649bcbfe797307a51782a53eb18f.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7f35572982a3722c98291f5e6d8ea155.png\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7da91d8c886a13eba5bb528893ee169.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7f35572982a3722c98291f5e6d8ea155.png\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff7614164d4ce4cae6ba54cc249c1eaa3.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1caa47bac567dcd968ee4399ea66839.png\">如图所示,半径为R的均匀带电球面,总电荷为Q,设无穷远处的电势为零,则球内距离球心为r的P点处的电场强度的大小和电势为",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],141977547,[75,76,77,78],"R \u002F r","R2 \u002F r2","r2 \u002F R2","r \u002F R","半径分别为R和r的两个金属球,相距很远.用一根细长导线将两球连接在一起并使它们带电.在忽略导线的影响下,两球表面的电荷之比为",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],141977548,[84,85,86,87],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F734023b45d06a2d5f1f9b2aab9b22d03.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa2ce3a92fb20438ed5804d5943678bbd.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8b85401e887eda91794008e3e41f2941.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faba92a32a005b8bc9e6c42bd292d826b.png\">","一空心导体球壳,其内、外半径分别为R1和R2,带电荷q,如图所示.当球壳中心处再放一电荷为q的点电荷时,则导体球壳的电势(设无穷远处为电势零点)为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4a13ccc47efb4979832c9c96c6801f58.png\">",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],141977549,[93,94,95,96],"既无自由电荷,也无束缚电荷","没有自由电荷","自由电荷和束缚电荷的代数和为零","自由电荷的代数和为零","在静电场中,作闭合曲面S,若有\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F30837695cb9b94c3d91d5b861f746882.png\"> (式中\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb633d819953a770efab131fea539c602.png\">为电位移矢量),则S面内必定",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],141977550,[102,103,104,105],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff946ebab6b435cfb75bf834214e10915.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F97a4281776e452537da677419ea1f356.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd477b378764d320f5610dd866602db8c.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7fdcd451cbbad810a8a9bd59020a1ee0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F07b6a26202c5ff560e58be0d96d38f6b.png\">如图所示,边长为a的等边三角形的三个顶点上,分别放置着三个正的点电荷q、2q、3q.若将另一正点电荷Q从无穷远处移到三角形的中心O处,外力所作的功为"]