[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fDCb5e4sYLuCoEl99h-bF90Si51hU4hv74ENpWzn52oY":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-07-03 22:35:12",91779384,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F668a38bdece5c8417c09e69384aa9a83.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F93e8d7b41ccb1944a641b178ae812c5a.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F74c5e56b649afe7a4ff14b665ed6c676.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7dee9a05eccc316e9cd1a163650442ed.png\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},14,"f763367d36fc09206535d729b104d620","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F66f1d06f507e180dbb38a48d65920c31.jpg","大学物理A上-2023春季学期","work_27398512","2023年春第五章静电场1电场强度王勇.xls","一个带负电荷的质点,在电场力作用下从A点出发经C点运动到B点,其运动轨迹如图所示.已知质点运动的速率是递减的,下面关于C点场强方向的四个图示中正确的是 [ ]",[21,32,41,44,53,62,71,77,83,88],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],91779382,[25,26,27,28],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb25bda4b223cf6b903bd87bb71a6a419.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2db72873d16b6e69499e47dba81320f0.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3669a8871b90ab760830218548e65599.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb60031172a30716e5159e9daa21ae750.png\">","正方形的两对角上,各置电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F837088b880ab944cac53b231d0cd15e2.png\">,在其余两对角上各置电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7412985d0ba37b933fde78747e4169d6.png\">,若\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F837088b880ab944cac53b231d0cd15e2.png\">所受合力为零,则\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F837088b880ab944cac53b231d0cd15e2.png\">与\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7412985d0ba37b933fde78747e4169d6.png\">的大小关系为 [ ]","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],91779383,[36,37,38,39],"位于该处的点电荷所受的力越大","该处的电场强度越大","该处的电场强度不可能为零","以上说法都不正确","空间某处附近的正电荷越多,那么有[ ]",{"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},[],91779385,[48,49,50,51],"曲面 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d44d72acf9ae7be7c0ea7bf7b7dbab7.png\">的电场强度通量不变,曲面上各点电场强度不变","曲面 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d44d72acf9ae7be7c0ea7bf7b7dbab7.png\">的电场强度通量变化,曲面上各点电场强度不变","曲面 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d44d72acf9ae7be7c0ea7bf7b7dbab7.png\">的电场强度通量变化,曲面上各点电场强度变化","曲面 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d44d72acf9ae7be7c0ea7bf7b7dbab7.png\">的电场强度通量不变,曲面上各点电场强度变化","闭合曲面\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d44d72acf9ae7be7c0ea7bf7b7dbab7.png\">包围点电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F09ae1c8b7aa44dc11a18c5c63a7dd64c.png\">, 现从无穷远处引入另一点电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7412985d0ba37b933fde78747e4169d6.png\">至曲面外一点,如图所示,则引入前后[ ]\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F116dc5fe980bffdd4bc6c76e1d1ad8ac.jpg\">",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],91779386,[57,58,59,60],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5b6751d29dbb745c2066d0a46fc402f9.png\">不仅与高斯面内的电荷有关,而且还与高斯面外的电荷有关","积分式中的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7bae1734d22e770bf84a7ef509fb127e.png\">一定是电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F49ab9d62892bd2fa5997470c1ec340ee.png\">所激发的","积分式中的\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7bae1734d22e770bf84a7ef509fb127e.png\">是由高斯面内、外所有电荷共同激发的","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F102b0d4c83d8f74ce81f92910c174a20.png\">是空间所有电荷的代数和","关于真空中静电场的高斯定理:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7965061f7b42cad82a50b80e4ff06e66.png\">下述哪种说法是正确的?[ ]",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],91779387,[66,67,68,69],"q\u002Fε0","q\u002F2ε0","q\u002F4ε0","q\u002F6ε0","在边长为a的正立方体中心有一个电量为q的点电荷,则通过该立方体任一面的电场强度通量为:[ ]",{"answer":72,"createTime":5,"id":73,"options":74,"question":75,"source":30,"type":76},[],91779388,[],"半径为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4bc6c4c510b505dd7c86ac8542cb94aa.png\">的半球面置于场强为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb1e6c37b65f12791d040c0d826cbcea.png\">的均匀电场中,其对称轴与场强方向一致,如右图所示,则通过该半球面的电场强度通量为____.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F27ce55fe05ce9b0fe4f55cea2fa0487d.jpg\">",2,{"answer":78,"createTime":5,"id":79,"options":80,"question":81,"source":30,"type":82},[],91779389,[],"一个细玻璃棒被弯成半径为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6b6454d6bf2cfa05dfe4f80ae8efa187.png\">的半圆形,沿其上半部分均匀分布有电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffeeba3955f5d53b464a365fdece3775e.png\">,沿其下半部分均匀分布有电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F383c2039587212328ce36645c49cd86e.png\">,如图所示.试求:(1)圆心\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3008725c1b05b4301b168f60b0176f85.png\">处的电场强度;(2)电场强度的方向.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc732b5a46937732dd8c91e6045bc720f.jpg\">",4,{"answer":84,"createTime":5,"id":85,"options":86,"question":87,"source":30,"type":82},[],91779390,[],"如图所示,有一长\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F48c49a48138d4881338dcd35aa8b0480.png\">的带电细杆,电荷均匀分布,线密度为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb3fb9996cbcbcd94883b62017962689e.png\">.求:⑴杆上距原点x处的线元dx对P点的点电荷\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F263d756d197817a543b84cdabaf3fcde.png\">的电场力;⑵\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F263d756d197817a543b84cdabaf3fcde.png\">受的总电场力;⑶若\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbcf95405db0b1c7d0443e1b1fdc6af40.png\">,\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F987ca218f0cc6ea88670c3a0528a82aa.png\"> ,则P点的电场强度是多少?\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F334b946214c5aeb833b26ce2f54aad8e.jpg\">",{"answer":89,"createTime":5,"id":90,"options":91,"question":92,"source":30,"type":82},[],91779391,[],"真空中两条平行的无限长均匀带电直线相距为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F84586cc8cd279b544ba5113cca1923ab.png\">,其电荷线密度分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2d892b46c8e45c418c257949088260c9.png\">和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe0fd703a1f11bdd5f5fd1aa86db9ddbe.png\">.如图,取两直线的中点为坐标原点,两直线所在平面上向右为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F067aca5ae44d6c6d3d9b0eadf0fea91b.png\">轴正方向,试求:⑴在两带电直线间\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F067aca5ae44d6c6d3d9b0eadf0fea91b.png\">轴上任一点的电场强度;⑵两带电直线上单位长度之间的相互作用力.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F785d14fd4da09b01b50d2d2fd41d1c98.jpg\">"]