[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fbqEV1lVZEZyFTUEC8unnn01_MWZDZ-LhCOYQKtDkVP4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-01-09 11:44:25",129480673,[8,9,10,11],"QA∶QB=RA∶RB sA∶sB=RB∶RA","QA∶QB=RB∶RA sA∶sB=RA∶RB","QA∶QB=2RA∶RB sA∶sB=RB∶2RA","QA∶QB=RB∶2RA sA∶sB=2RA∶RB",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},11,"78c265dd1ba8043769ded9b84b236d21","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F206fe51ee9ef358aebb3d21dae58fe7e.png","2023秋普通物理学（二）重修班","work_29773237","第13章 静电场中的导体和电介质(全单选)","两导体球半径分别为RA和RB,A球带电Q,B球不带电,现用一细长导线连接,则分布在两球上的电荷之比QA∶QB= ;两球面的电荷密度的比值sA∶sB=",[21,32,41,48,57,66,71,74,83,92],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],129480660,[25,26,27,28],"内部电势为零,场强不为零","内部场强为零,电势不为零","内部和表面的电势不相等","内部电势较表面电势低","静电平衡中的导体 [ ]","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],129480663,[36,37,38,39],"增大","减小","不变","为零","将一个带正电的导体靠近一个不带电的导体A,则导体A的电势将 [ ]",{"answer":42,"createTime":5,"id":43,"options":44,"question":47,"source":30,"type":31},[],129480664,[45,46,38,39],"升高","降低","在一个不带电的金属球壳的球心放置一个+q点电荷,若将此电荷偏离球心,则球壳上的电势将 [ ]",{"answer":49,"createTime":5,"id":50,"options":51,"question":56,"source":30,"type":31},[],129480666,[52,53,54,55],"0V","200V","600V","1000V","两只电容器,C1=8mF, C2=2mF,分别把它们充电到1000V,然后将它们反接(C1正极板与C2负极板相连,C1负极板与C2正极板相连),此时两极板间的电势差为 [ ]",{"answer":58,"createTime":5,"id":59,"options":60,"question":65,"source":30,"type":31},[],129480669,[61,62,63,64],"电容器的电容量","两极板间的场强","两极板间的电势差","电容器储存的能量","一平板电容器充电后切断电源,若改变两极板间的距离,则下述物理量中哪个保持不变",{"answer":67,"createTime":5,"id":68,"options":69,"question":70,"source":30,"type":31},[],129480671,[61,62,63,64],"一平板电容器充电后电源保持连接,若改变两极板间的距离,下列物理量保持不变的是[ ]",{"answer":72,"createTime":5,"id":6,"options":73,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":75,"createTime":5,"id":76,"options":77,"question":82,"source":30,"type":31},[],129480674,[78,79,80,81],"8.0×106V\u002Fm;0","4.0×106V\u002Fm;0","0;4.0×106V\u002Fm","4.0×106V\u002Fm;8.0×106V\u002Fm","如图所示,在金属块中有一半径为3cm的球形空腔,空腔中心O点处有一点电荷q=1.0×10-7C,则空腔中a点(oa=1.5cm)处的场强Ea为 金属块b点(ob=4cm)处的场强Eb为_ _ \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F23d461f67763b18898f7f057e0c8d338.png\">",{"answer":84,"createTime":5,"id":85,"options":86,"question":91,"source":30,"type":31},[],129480675,[87,88,89,90],"C=10μF; U2=600V ; U= 380V","C=1.6μF; U2=600V ; U= 380V","C=10μF; U2=800V ; U= 320V","C=1.6μF; U2=800V ; U= 320V","两只电容 C1=8μF, C2=2μF,串联后用电动势为1000V的电源充电,则电路的等效电容为C= ,C2上的电压U2= .若将充电后的电容与电源断开,彼此之间也断开,再把它们的正极板与正极板相连,负极板与负极板相连,再算它们正、负极板间的电压U=",{"answer":93,"createTime":5,"id":94,"options":95,"question":100,"source":30,"type":31},[],129480676,[96,97,98,99],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc81f8924e08942e54a53ee54b9ffa9c2.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1e8558c79cff575d0c9aa81a76844e51.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffc3cd2069c72bf8fcb75b1c0bcda134d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F570dbf26d10b358f86b90d68496d5a6c.png\">","一空气平行板电容器,极板面积为S,两极板相距为d,电容器两端电压为U,则电容器极板上的电量q= .若将厚度为d\u002F2的金属板平行插入电容器内,保持电压U不变,则极板上电量增加Δq= \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6e8d9272b11f5fcef242f39d90ca29aa.png\">"]