[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1oZ2xBibd_o8PZVfPpJoz62iow1kqAKWabIhJdNcCYo":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2023-05-09 16:32:34",897317053,[8,9,10,11],"从A到B,电场力作功最大","从A到C,电场力作功最大","从A到D,电场力作功最大","从A到各点,电场力作功相等",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"1000007349","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0637f594f6a1d6f974533a5e15080a7b.jpg","电磁学","41855334","电磁学教程考试","点电荷q位于圆心O处,A、B、C、D为同一圆周上的四点,如图所示.现将一试验电荷从A点分别移动到B、C、D各点,则( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6e64b6aac9737dc8a1df6bfd02dcadca.PNG\">",[20,31,40,49,59,68,77,86,89,98],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],897317000,[24,25,26,27],"升高","降低","不变","变化与否不能确定","把一个带正电的导体B靠近一个不带电的绝缘导体A时, 导体A的电势将()","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":39,"source":29,"type":30},[],897317008,[35,36,37,38],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9948faf70a38d2d8b776e72c2cc66e19.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7bb62639ab6c120a01f4543c96bc20ef.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F85b7b9cf41b02c156017acda8217ddab.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F245035266dc3cc12c438e156d3fdecc2.PNG\">","一导体球外充满相对电容率为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F19efd8fab3de891efbc62aff8a5f6369.PNG\"> 的均匀电介质, 若测得导体表面附近场强为E, 则导体球面上的自由电荷面密度\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F94cbc72658d70e1721626861d2f221b0.PNG\"> 为",{"answer":41,"createTime":5,"id":42,"options":43,"question":48,"source":29,"type":30},[],897317010,[44,45,46,47],"涡旋电场是无源场","涡旋电场的电场线是闭合线","涡旋电场可在导体中形成持续电流","涡旋电场的场强依赖于导体的存在","下列说法中唯一错误的说法是",{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":58},[],897317015,[53,54,55,56],"场强叠加原理","静电场中的高斯定理","电势梯度的相反数","求单位正试验电荷所受的电场力","计算电场强度的方法有()",1,{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":29,"type":30},[],897317019,[63,64,65,66],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0a309c1967996c7122aa875942957792.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4c483f6c16df77757accc6d46640a348.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe8b281aef7e0a1951dbc5eaf51189e1a.PNG\">","0","真空中有一点电荷 Q,在与它相距为 r的 a点处有一试验电荷 ,现使试验电荷 q从 a点沿半圆弧轨道运动到 b点,如图所示,则电场力对 q作功为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F320a7955b33c6c065f632076a7b8efb5.PNG\">",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":29,"type":30},[],897317029,[72,73,74,75],"I区","II区","III区","IV区","如图所示,六根无限长导线相互绝缘, 通过的电流均为I, 区域I、II、III、IV均为相等的正方形.问哪个区域垂直指向里的磁通量最大 ?\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc4a55a47e3889a793c5026dc3e87fde0.PNG\">",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":29,"type":30},[],897317035,[81,82,83,84],"感应电场也是保守场","感应电场的电场线是一组闭合曲线","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa7ef46000886eeb5ec80e9b8987a853a.PNG\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb24e1875cca42ee9564a8218d322d601.PNG\">","下列概念正确的是",{"answer":87,"createTime":5,"id":6,"options":88,"question":18,"source":29,"type":30},[],[8,9,10,11],{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":29,"type":30},[],897317055,[93,94,95,96],"线圈中通过的电流增大一倍时, 自感变为2L","将螺线管半径增大一倍时, 自感变为4L","在原来密绕的情况下, 用同样直径的导线再顺序密绕一层, 自感变为2L","换用直径比原来直径小一倍的导线密绕一层, 自感变为L\u002F2","长为l的单层密绕螺线管, 共有N匝导线, 自感为L.则",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":29,"type":58},[],897317057,[102,103,104,105],"汤姆孙效应中非静电力的来源是温度梯度引起的载流子的定向移动","佩尔捷效应中非静电力的来源是载流子浓度不同引起的定向移动","温差电动势是汤姆孙效应和佩尔捷效应共同作用的结果","应用温差电效应做成的热电偶可以用来精确的测量未知温度","对于温差电现象,以下说法正确的是()"]