[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fL7d4_LpIAiknHB-4ofTUTHUo8XMCSdiVHbrQ0ZNiJy4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":18,"related":19,"source":29,"type":30},[],"2023-05-07 22:04:26",8838558,[8,9,10,11],"B = 0,因为B1 = B2 = B3 = 0","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffcd518e34fd20722fa1a4ad81011ae41.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fea1f16bc9d7b067be1d8ede8c4f2d2ef.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F61cecc89b32230e6bcba188dc9b3cd5d.png\">",{"courseId":13,"courseImg":14,"courseName":15,"workId":16,"workName":17},"2085641","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F71d2e482d2d3f8dc857329ab8e3fd919.png","大学物理（二）","5279053","大学物理（二）教程考试","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa85587c8fa0f9b4785dd8922a6335a51.png\">",[20,31,39,49,58,67,72,75,84,93],{"answer":21,"createTime":5,"id":22,"options":23,"question":28,"source":29,"type":30},[],8838512,[24,25,26,27],"电场中某点场强的方向,就是将点电荷放在该点所受电场力的方向","在以点电荷为中心的球面上,由该点电荷所产生的场强处处相同","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7478d07c1663fade0a6af287cbceb9d8.png\">","以上说法都不正确","下列几个说法中哪一个是正确的","v2",0,{"answer":32,"createTime":5,"id":33,"options":34,"question":37,"source":29,"type":38},[],8838513,[35,36],"对","错","受激辐射有光放大作用.()",3,{"answer":40,"createTime":5,"id":41,"options":42,"question":47,"source":29,"type":48},[],8838526,[43,44,45,46],"等势面的方向与电场方向垂直","电势梯度方向与电场强度方向相反","等势面密处电场强,稀处电场弱","电势梯度方向与电场强度方向相同","关于等势面与电势梯度,下列说法正确的是",1,{"answer":50,"createTime":5,"id":51,"options":52,"question":57,"source":29,"type":30},[],8838531,[53,54,55,56],"曲面S的电场强度通量不变,曲面上各点场强不变","曲面S的电场强度通量变化,曲面上各点场强不变","曲面S的电场强度通量变化,曲面上各点场强变化","曲面S的电场强度通量不变,曲面上各点场强变化","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe5abce39e4007d06db6f5ed291087050.png\">",{"answer":59,"createTime":5,"id":60,"options":61,"question":66,"source":29,"type":48},[],8838536,[62,63,64,65],"适用于无限长密绕螺线管","适用于单匝圆线圈","适用于一个匝数很多,且密绕的螺绕环","适用于自感系数L一定的任意线圈","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe894901112d01bad389aff0a22b41d8d.png\">",{"answer":68,"createTime":5,"id":69,"options":70,"question":71,"source":29,"type":38},[],8838547,[35,36],"利用带电粒子在磁场中运动的特征可以测量电子的荷质比",{"answer":73,"createTime":5,"id":6,"options":74,"question":18,"source":29,"type":30},[],[8,9,10,11],{"answer":76,"createTime":5,"id":77,"options":78,"question":83,"source":29,"type":48},[],8838559,[79,80,81,82],"越高能级的能带,宽度越大","原子点阵间距越小,能带宽度越大","能带宽度与晶体包含的原子数有关","能带宽度与晶体包含的原子数无关","关于能带宽度的描述正确的是",{"answer":85,"createTime":5,"id":86,"options":87,"question":92,"source":29,"type":30},[],8838575,[88,89,90,91],"1","N","2N","N\u002F2","N个Na原子形成稳定原子团簇时,原子的3s能级分裂成多少个能级",{"answer":94,"createTime":5,"id":95,"options":96,"question":97,"source":29,"type":38},[],8838588,[35,36],"一导体圆线圈在均匀磁场中运动,能使其中产生感应电流的一种情况是线圈绕自身直径轴转动,轴与磁场方向垂直"]