[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fu8V__LQRzUZrmXY-HYKyThd8S6Y0UxfI25PQQIuTjP4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2025-06-20 01:34:46",204951571,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6855613a51639a1bebf1d4ef04b329aa.png\"><br>","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9be323a97d5107cbce82b42a7d3ca756.png\"><br>","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F465209fc43bd1c9a20b47a3700ff371a.png\"><br>","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc60288a0ae36490cee47bca36a0a451c.png\"><br>",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},15,"0e8dfad2bc2cb3ed90603742156a4b30","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe7b1e6905a34e261fc93da0a49aa3161.png","大学物理A1","work_43576346","12.库伦定律,电场强度","两根无限长的均匀带电线相互平行,相距为2a,线电荷密度为+λ和-λ,每单位长度带电线受到另一条带电线的作用力大小为( )",[21,33,42,52,61,70,79,88,97,100],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2025-06-20 01:34:44",204951555,[26,27,28,29],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F206ad3bf8b6ce640b7ff05e1b4ef1d05.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbed35ad59d73a86a6593d6093dbed603.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffba3e75348ed464d10f9028f69186da6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8888261a10c74aa3df9a67ce19b6e3c6.png\">","如图所示,有三个点电荷Q1、Q2、Q3沿一条直线等间距分布,且Q1=Q3=Q,已知其中任一点电荷所受合力均为零,则Q2大小为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F207b2e4f958951b71cbda4afcb20b5c4.png\">","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],204951557,[37,38,39,40],"\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\">","正方形的两对角线上,各置电荷Q,在其余两对角线上各置电荷q,若Q所受合力为零,Q与q的大小关系为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5d948edb8371e1704e7c3b888493420d.png\">",{"answer":43,"createTime":44,"id":45,"options":46,"question":51,"source":31,"type":32},[],"2025-06-20 01:34:45",204951560,[47,48,49,50],"5","1\u002F5","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F361b664af38b27956545458648205f4b.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F811eba733ba59b5cd8315b1a764401f7.png\">","三个点电荷均在同一条直线上,A、C固体不动,A和C电荷之比为5:1,而B也不动时,BA与BC之间的比值为( )",{"answer":53,"createTime":44,"id":54,"options":55,"question":60,"source":31,"type":32},[],204951562,[56,57,58,59],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F99487ca4181775a1cc8084cfc41d6ca7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd995b5df72a4ea80baa383db0187bbb7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F51a9269aedaba266a54e3bae5a3e2beb.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5261b7bdf24063c9f83e5efb5bc0ff04.png\">","三个电量为q的电荷放在边长为b的等边三角形的顶点,电荷Q放在三角形的重心上.为使每个电荷受力为零,Q为( )",{"answer":62,"createTime":44,"id":63,"options":64,"question":69,"source":31,"type":32},[],204951564,[65,66,67,68],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3551413f26c222a5f8f18c208e6da888.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F04a47e597862141c6479c5a7e8d645ab.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6b2f53a52a3190e0fe5d1bed20f9ea40.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1c96808f88d82c9d6e78cf65d5c39b46.png\">","如图所示,现有两无限大均匀带电平面,两平面平行,电荷面密度均为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbd1a860ea5befaed9b60ac326ec747ab.png\">,则图中三个区域内场强的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1335ea99886ad949089be523bc2e5051.png\">",{"answer":71,"createTime":44,"id":72,"options":73,"question":78,"source":31,"type":32},[],204951566,[74,75,76,77],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1f13386b7b85b0e3bed7b93379032985.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcc9a335b2608c0d024f3320d517d33ce.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc5346fba0011c8d91f249d52a567a087.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbe771e1668424c812ebbf6277e5daea9.png\">","如图所示,真空中有两带电平面,面积均为S,相距为d(d很小),带电量分别为+q和-q,两平面间作用力F的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa1456f376d3477429b28153ec1d759dc.png\">",{"answer":80,"createTime":44,"id":81,"options":82,"question":87,"source":31,"type":32},[],204951567,[83,84,85,86],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb199e0e55ba0c7c35ef494b550ebde58.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F760cee605ebb8b677b7d0c767342e2ef.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd6a42de0955e8b919cb788235816af5d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71e7d028468dc6f0c6af1b84d5b0542a.png\">","如图所示,在边长为a的正方形的三个顶点上各放置电量为+q、-q、+q的点电荷,则D点处场强的大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7bad23df5ceead36bdde408bcf7af7ea.png\">",{"answer":89,"createTime":5,"id":90,"options":91,"question":96,"source":31,"type":32},[],204951568,[92,93,94,95],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe31437505304842787c3026950218d1a.png\"><br>","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a0fb5928babb543c5b4d13fb1e3f3e1.png\"><br>","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc513d879acc61290a51205b79177afd4.png\"><br>","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8ed91fc1405bb9ec757340902d81d4db.png\"><br>","将电荷Q分成q和(Q-q)两部分,并将它们分开一定的距离,它们之间静电力为最大的条件是( )",{"answer":98,"createTime":5,"id":6,"options":99,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":101,"createTime":5,"id":102,"options":103,"question":104,"source":31,"type":105},[],204951573,[],"一半径为R的半圆细环上均匀地分布电荷Q,求环心处的电场强度.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff4e8f91d44aeb5fabd79513c372b5cab.png\">",4]