[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fhynTIDLJVpeWQAMVZrcI9YteTidFtkvFSZ4ljCxPrt0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-05-14 10:48:52",9979559,[8,9,10,11],"电源的电动势跟电源内非静电力做的功成正比,跟通过的电荷量成反比","电源电动势的数值等于电源未接入电路时两极间的电势差","干电池电动势为1.5V,表明将1C的正电荷从电源负极移到正极,通过非静电力做功,将其它形式的能量1.5J转化为电能","E=\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7b4710418f1435a4a004408c6fe13c1a.jpg\">只是电动势的定义式而非决定式,电动势的大小是由电源内非静电力的特性决定的",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},5,"a0ead0dfe7757a4b3e8676a0b549e43c","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F15c6b993841ebfae76dc99474ccad8c1.png","大学物理（2023春）40学时","01accd6ff23c49aca36e0a9098723ecd","动生电动势 感生电动势","下列关于电动势的说法错误的是",[21,32,35,44,53],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],9979558,[25,26,27,28],"动生电动势是洛仑兹力对导体中自由电荷做功而引起的","因为洛仑兹力对运动电荷始终不做功,所以动生电动势不是由洛伦兹力而产生的","动生电动势的方向可以由右手定则来判定","导体棒切割磁感线产生感应电流,受到的安培力一定与受到的外力大小相等,方向相反","下列说法中正确的是","v1",0,{"answer":33,"createTime":5,"id":6,"options":34,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":30,"type":31},[],9979560,[39,40,41,42],"A 点比 B 点电势高","A 点与 B 点电势相等","A 点比 B 点电势低","有稳恒电流从 A 点流向 B 点","如图所示,导体棒 AB 在均匀磁场中绕通过 C 点的垂直于棒长且沿磁场方向的轴 OO′转动(角速度ωv 与 Bv 同方向), BC 的长度为棒长的 1\u002F3.则: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F629cf07a42050b14068aaadec4a2d2de.png\">",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],9979561,[48,49,50,51],"感应电动势不同, 感应电流不同","感应电动势相同,感应电流相同","感应电动势不同, 感应电流相同","感应电动势相同,感应电流不同","尺寸相同的铁环与铜环所包围的面积中,通以相同变化率的磁通量,则环中",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],9979562,[57,58,59,60],"电动势只在直导线中产生","电动势只在曲线中产生","电动势在直导线和曲线中都产生,且两者大小相等","直导线中的电动势小于弯曲的导线","圆柱形空间内有一磁感强度为B的均匀磁场,B的大小以恒定速率变化.在磁场中有A、B两点,其间可放直导线或弯曲的导线: \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fea27ec7e6da6fe24a9283f656e2c524c.png\">"]