[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fU0urGmE1SG14vDT4jz_SAHpojXgZCkktF6iYn_IOq40":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":31,"type":32},[],"2023-10-06 19:20:39",99022614,[8,9,10,11],"①、②","③、④","①、③、④","①、②、③、④",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"efde6627af230174e0f3efe86428f0e5","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9c03ed59e7daf0315a29d59132da9131.jpg","大学物理(II) - 电磁学、光学和近代物理（6期）","work_29557230","8-9 静电场中的导体","空腔导体达到静电平衡时,① 导体外电荷和导体外表面电荷在导体内产生的场强之和为零② 空腔导体接地时,外表面上的感应电荷被大地电荷全部中和,这时外表面不带电荷③ 导体内表面上的电荷分布与外电场无关,只取决于腔内带电体和导体内表面形状 ④导体外表面上的电荷分布与腔内带电体的位置无关,只取决于外表面的形状和外电场 上述说法中正确的是[ ]",[21,33,42,51,59,68,77,86,89,98],{"answer":22,"createTime":23,"id":24,"options":25,"question":30,"source":31,"type":32},[],"2023-10-06 19:20:38",99022599,[26,27,28,29],"表面上电荷密度较大处电势较高","导体内没有电场线","如果导体带正电,导体内部的电势高于表面","如果导体带负电,导体内部的电势高于表面","当一个带电导体达到静电平衡时,下列说法正确的是[ ]","v1",0,{"answer":34,"createTime":23,"id":35,"options":36,"question":41,"source":31,"type":32},[],99022601,[37,38,39,40],"导体内电场大小和电势均为零","导体内电场大小不为零,电势为零","导体内的电势与导体表面的电势不相等","导体内任意两点之间的电势是相等的","关于带电导体球的电场和电势,下列说法正确的是[ ]",{"answer":43,"createTime":23,"id":44,"options":45,"question":50,"source":31,"type":32},[],99022603,[46,47,48,49],"对电场强度有影响,对电势无影响","对电场强度无影响,对电势有影响","对电场强度、电势均无影响","对电场强度、电势均有影响","封闭导体壳外有一些带电体,所带电荷分别为Q1,Q2,Q3,…,这些电荷电量的大小对导体壳内的电场强度和电势的影响为[ ](设无限远处电势为零)",{"answer":52,"createTime":23,"id":53,"options":54,"question":58,"source":31,"type":32},[],99022605,[11,55,56,57],"①、②、④","②、④","①、③","下列关于温度均匀、材质均匀的导体的各种说法中,正确的是[ ] ① 导体达到静电平衡后,其表面曲率越大的地方,面电荷密度也越大 ② 导体达到静电平衡后,其内部场强处处为零 ③ 导体达到静电平衡后,其电荷只能分布在外表面 ④ 导体达到静电平衡后,其表面处场强都与导体表面垂直",{"answer":60,"createTime":23,"id":61,"options":62,"question":67,"source":31,"type":32},[],99022607,[63,64,65,66],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1613fbe7c58086bbde389b32897549e3.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F46c5d64a4f45d780f66662f9efe52dc9.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7399822acddcfe0a3ca685d9c1ac28ad.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8a86bca5d725a72d61857384a808ebf9.webp\">","厚度为d的无限大带电导体平板,两表面上电荷均匀分布,电荷面密度均为s ,则板外两侧的电场强度的大小为[ ]",{"answer":69,"createTime":23,"id":70,"options":71,"question":76,"source":31,"type":32},[],99022609,[72,73,74,75],"铜丝编织的衣服不易拉破,所以用铜丝编织","电工被铜丝编织衣服包裹,使体内电势保持为零,对人体起保护作用","电工被铜丝编织衣服包裹,使体内电场强度保持为零,对人体起保护作用","铜丝必须达到一定厚度,才能对人体起到保护作用","电工穿的高压作业服是用铜丝编织的,下列说法正确的是[ ]",{"answer":78,"createTime":23,"id":79,"options":80,"question":85,"source":31,"type":32},[],99022611,[81,82,83,84],"点电荷在球内各点所产生的电场强度大小相同","感应电荷在球心产生的电场强度大小为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9dcebdb8355b736ad1b170b26d8f3a01.webp\">","感应电荷在球心产生的电场强度大小为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1b8c727a73e461ba50cd55197437864a.webp\">","感应电荷在球内各点所产生的电场强度大小相同","将一个带电量为q的点电荷放在一个半径为r的导体球附近,点电荷距离导体球球心为d(d>r),则[ ]",{"answer":87,"createTime":5,"id":6,"options":88,"question":19,"source":31,"type":32},[],[8,9,10,11],{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":31,"type":32},[],99022617,[93,94,95,96],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F178ac232e3e59a775992f843ff925f7e.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdaad2dc0ad2302340ceabc7a66b084f5.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F18890972183915ab0fb1732d6f1dc351.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe8c50b6b837995a677713091e10a3557.webp\">","两个同心薄金属球壳的半径分别为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3bce4474ccb142f86f13b9a0d0769c48.webp\">和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F19134de32a213e9c4c87208448801480.webp\">(\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F79dfedf0d90274c571a9e20ea702753a.webp\"><\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faabde037afd87b5c6420e11b6451614c.webp\">),分别带有电量为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F53cbc2126de3ba1456e213a08c74a5cd.webp\">和\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff043282a2aca27706dd03fc960508397.webp\">的正电荷,则内球壳的电势比外球壳高出[ ]",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":31,"type":32},[],99022619,[102,103,104,105],"电势改变,电势差不变","电势不变,电势差改变","电势和电势差都改变","电势和电势差都不变","导体壳内有点电荷q,壳外有点电荷Q,导体壳不接地.当Q的电量改变时,下列关于导体内(导体实心部分)任一点的电势、任两点间的电势差的说法中正确的是[ ]"]