[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fnVpiTijzSAcf6phOHxd7jO_sEG6vn7w32X56Q7lSqto":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-09-25 13:27:50",160163642,[8,9,10,11],"球壳内、外场强分布均无变化","球壳外场强分布改变,球壳内不变","球壳内场强分布改变,球壳外不变","球壳内、外场强分布均改变",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},18,"edea9950e39ee1077c8b4f9f944857b2","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F67f9fd1984c0fe61d4fe4bfe81a47087.jpg","大学物理B2","work_37000337","13静电场中的导体1(刘畅)","在一不带电荷的导体球壳的球心处放一点电荷,并测量球壳内外的场强分布.如果将此点电荷从球心移到球壳内其它位置,重新测量球壳内外的场强分布,则将发现: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F496daa785bc52d29e4b8a17ba9078a1c.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},[],160163639,[25,26,27,28],"s1 = -s , s2 = +s","s1 = -s\u002F2, s2 = +s\u002F2","s1 = -s , s2 = 0","s1 = -s\u002F2, s2 = -s \u002F2","一"无限大"均匀带电平面 A,其附近放一与它平行的有一定厚度的"无限大"平面导体板 B,如图所示.已知 A 上的电荷面密度为 s, 则在导体板 B 的两个表面 1 和 2 上的感应电荷面密度为:[ ] \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5d3717098bdb6973e6c861f6b3deba48.png\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],160163640,[36,37,38,39],"V1","V2","V1 +V2","0.5(V1 +V2)","两个同心薄金属球壳,半径分别为 R1 和 R2 ( R2 > R1 ),若分别带上电荷 q1 和 q2,则两者的电势分别为 V1 和V2 (选无穷远处为电势零点).现用导线将两球壳相连接,则它们的电势为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5bff4d2a84526063a2a0a0dbee174bbd.png\">",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],160163641,[45,46,47,48],"VB > VA> 0","VB < VA = 0","VB =VA","0<VB < VA","A、B是两块不带电的导体,放在一带正电导体的电场中,如图所示. 设无限远处为电势零点,A的电势为VA, B 的电势为VB,则 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe21da38c755ff66a1f84dd2508b07d8b.png\">",{"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},[],160163643,[57,58,59,60],"只有当q>0时,金属球才下移","只有当q<0时,金属球才下移","无论q是正是负金属球都下移","无论q是正是负金属球都不动","有一接地的金属球,用弹簧吊起,金属球原来不带电.若在它下方放置一电量为q的点电荷,如图所示,则[ ]\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9aa314ff7b1378b4affd94a9beb9d508.png\">",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],160163644,[66,67,68,69],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6a5d9e8be80081faebadba396da3e182.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffeeda5fc2440061a28a487dc8759f032.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9a9c038e83661cd848fafb5c04a5c9f6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c71047f7eafb447dcffef660e443fc4.png\">","选无穷远处为电势零点,半径为R的导体球带电后,其电势为V0,则球外离球心距离为 r 处的电场强度的大小为",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],160163645,[75,76,77,78],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5dc4413aaea9b850637c9f0d1b1135bd.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F47e1f4ee5cc7424ade9ff430061d71c3.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F795c33a308b74eda18f44046aee3e5d0.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7ec1387203c324e6d9ba4cd61011257c.webp\">","一金属球壳的内、外半径分别为R1和R2,带电荷为Q.在球心处有一电荷为q的点电荷,则球壳内表面上的电荷面密度为",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],160163646,[84,85,86,87],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f751ff8e5d021cbe88bd438df801d72.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F84232fa88c4abbf7da4a744c7a91da56.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F824d301ed4ecf9ddf987c9e753471a85.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F095f346d7b1b5990e49ba707b9fd95f3.png\">","如图所示,两个同心球壳.内球壳半径为R1,均匀带有电荷Q;外球壳半径为R2,壳的厚度忽略,原先不带电,但与地相连接.设地为电势零点,则在内球壳里面,距离球心为r处的P点的场强大小及电势分别为: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fceab53956c7defa383155c23dc7ea343.png\">",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],160163647,[93,94,95,96],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a12a00734d53c5534c7fdae4d6964d0.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71fb902e336307a3dce78a7d610966c0.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F899dea088db2642ec671d315a0b22140.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F272185affdd6370a95d3edb06616eddf.webp\">","如图, A、B为两导体大平板,面积均为S,平行放置.A板带电荷Q1,B板带电荷Q2,如果使B板接地,则AB间电场强度的大小E为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4f6fa93c42967d159f4bbe9158f69777.png\">",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],160163648,[102,103,104,105],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faa66986bc08b493775bff94ad3764cf8.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fda974f07c76f8f4db41005f401938a22.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbafd428c588c4b20b3aa3e3e6be097c6.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe8c0b8d93216465f66f4d1ebd94af844.webp\">","如图,一带电大导体平板,平板二个表面的电荷面密度的代数和为s ,置于电场强度为E0的均匀外电场中,且使板面垂直于E0的方向,设外电场分布不因带电平板的引入而改变,则板的附近左、右两侧的合场强为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F85e6b20e9d6be114d79b78c381f56e2e.png\">"]