[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fJ_1oe2mcX8TE4N90oNX14Yn-y-NTG3p8IrZH8HsAqeM":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-06-19 20:19:26",72500752,[8,9,10,11],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8df6e35d6f456fd765fab366fdf9e160.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd1e1060bb68ad7c80806f1297a552fbe.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa3af7369f4e50700fdca360972e27e42.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F589f7dfa6ff79a7be5b68054ed575711.png\">",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},156,"a0f51bb2f11729573650eaa0e9ee1240","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa33059ca59c7692b2ab84656f22544e3.png","大学物理A1-电子56-2022级","work_28301541","非原题","【单选题】将一根载有电流为I的无限长导线在一平面内弯成如下图所示的形状,其中有一段是半径为a的1\u002F4圆弧,则圆心O点的磁感应强度大小为( ).\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F37d39809330fd86cfa5a4ef3c51207b9.png\">",[21,32,41,50,59,68,77,86,95,104],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],72500743,[25,26,27,28],"(A) 只有(1)是正确的","(C) (1)、(3)是正确的","(D) (2)、(3)是正确的","(B) (1)、(2)是正确的","对质点组有以下几种说法: (1) 质点组总动量的改变与内力无关; (2) 质点组总动能的改变与内力无关; (3) 质点组机械能的改变与保守内力无关. 下列对上述说法判断正确的是( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],72500744,[36,37,38,39],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff1c32ad2bf3601a845c301f8068b238a.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2f9d83db6e001c49b270a6456b39a066.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1acadd82ac5b42c99628166d4a94f321.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd037a26a1c2860473acaef7de9aa2e67.webp\">","已知质点的运动方程r\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7148bbc2c1d721742bc17919ac5338ba.webp\">,则质点在2s末时的速度和加速度为",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],72500745,[45,46,47,48],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe0dd8c6779565adbfa24f4d1e4d9aff6.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb3f0d95c5261b2864af69734c6f5ab71.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fba3eecb67eebb9d693f546ea601c94b8.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F8f1db1571f0742eb9671bc223c22d00d.webp\">","Fx=30+4t(式中Fx 的单位为N,t 的单位为s)的合外力作用在质量m=10 kg 的物体上,试求:在开始2s 内此力的冲量",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],72500746,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F254f47efecb9a5eab2b2ccf94fc73c02.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcca0a7e96c55865bdb87904f759d4338.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbb601df42447a2574343b4f164ef31fc.png\">","1","【单选题】半径分别为R 及r的两个球形导体(R>r),相距很远,今用细导线连接起来,并使两导体带电,电势为V,则两球表面电量之比\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc3679da6b7fdda835e8a2ae11c2216fa.png\"> 为(5.0)",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],72500747,[63,64,65,66],"gcot θ","gsin θ","gcos θ","gtan θ","如图(a)所示,质量为m 的物体用平行于斜面的细线联结置于光滑的斜面上,若斜面向左方作加速运动,当物体刚脱离斜面时,它的加速度的大小为\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb6965cc4664e2940d67279e9202ca277.png\">",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],72500748,[72,73,74,75],""无限长"均匀带电直线",""无限长"均匀带电圆柱面",""有限长"均匀带电直线",""无限长"均匀带电圆柱体","【单选题】如图所示为轴对称静电场的E~r曲线,指出该电场是下列哪一种带电体产生的.( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F41761a4aab101dff13c260f7aa13accb.png\">",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],72500749,[81,82,83,84],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd73ec1076e1dd80eacc0ab6b10657ed1.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe4ce37df7d6db9ba1bad6c7634fbb5d6.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3feb96202409637ca72f9c113787f9e7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd532ffd40cbe891769c05ba65c676aa3.png\">","【单选题】如图所示,两个均匀带电的同心球面,内、外半径分别为R1、R2,内球面带电量为Q1,外球面带电量为Q2,设无穷远处为电势零点,则如图所示, 在内球面内,距离中心为r处的p点电势为:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcff21354625ac4bd5dec47d5879b5cd3.png\">",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],72500750,[90,91,92,93],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9ccba94d8fbdfa7aac4e3924da868096.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F33cd101c16161caeedfeef9f81f258ed.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffad23f56d37f1911cbdea9bef1b4d2d8.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F53fd46e32eb59ca79ed12d68fc6de100.webp\">","一质量为10 kg 的质点在力F 的作用下沿x 轴作直线运动,已知F =120t +40,式中F 的单位为N, t的单位的s.在t=0时,质点位于x =5.0 m处,其速度v0=6.0 m·s.求质点在任意时刻的位置",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],72500751,[99,100,101,102],"开始随FN增大,达到某一最大值后,就保持不变","不为零,但保持不变","无法确定","随FN成正比地增大","用水平力FN把一个物体压着靠在粗糙的竖直墙面上保持静止.当FN逐渐增大时,物体所受的静摩擦力Ff的大小",{"answer":105,"createTime":5,"id":6,"options":106,"question":19,"source":30,"type":31},[],[8,9,10,11]]