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热点9 带电粒子在电场中的运动_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训

  • 2026-03-10 10:14:45 2026-03-10 10:14:45

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热点9 带电粒子在电场中的运动_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训
热点9 带电粒子在电场中的运动_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训
热点9 带电粒子在电场中的运动_4.2025物理总复习_2023年新高复习资料_二轮复习_2023年高考物理二轮复习讲义+课件(新高考版)_2023年高考物理二轮复习讲义(新高考版)_学生版_考前特训

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热点 9 带电粒子在电场中的运动 1.(2022·辽宁省模拟)某平面区域内一静电场的等势线分布如图中虚线所示,相邻的等势线电 势差相等,一负电荷仅在静电力作用下由a运动至b,设该电荷在a、b两点的加速度大小分 别为a、a,电势分别为φ、φ,速度大小分别为v、v,电势能分别为E 、E ,则( ) a b a b a b pa pb A.a>a B.v>v a b b a C.E >E D.φ>φ pa pb a b 2.(2022·广西南宁市二模)空间有一沿x轴分布的电场,如图乙所示,x轴上有P、Q两点, 其位置坐标分别为x 、2x.一质量为m、电荷量为q(q>0)的粒子从坐标原点O以初速度v 沿 0 0 0 x轴正方向做直线运动,其速度v随位置x的变化规律如图甲所示,粒子仅受静电力作用. 则下列说法正确的是( ) A.粒子在OQ段克服静电力做功 B.粒子在OP段与PQ段动能增量相等 C.粒子在P点的电势能比Q点的小 D.P点的电势比Q点的电势高 3.(多选)(2022·东北三省三校第二次模拟)如图所示,水平放置的上、下两个带电金属板, 相距为3d,板间有竖直向下的匀强电场,电场强度大小E=,上板上方距上板d处有一带电 荷量为+q的小球B,其正上方有一带电荷量为-6q的小球A,它们的质量均为m,用长度 为d的绝缘轻杆相连.将两小球从静止释放,小球可以通过上板的小孔进入电场中.若空气 阻力不计,重力加速度为g,则下列说法正确的是( )A.A球刚进入电场时的速度大小为 B.A球刚进入电场时的速度大小为 C.B球能碰到下板 D.B球不能碰到下板 4.(多选)(2022·四川凉山州第二次诊断性检测)光滑水平桌面内固定一半径为R的圆形光滑绝 缘轨道,整个轨道处于水平向右的匀强电场中,其俯视图如图所示.一质量为 m的带电小 球(看作质点)在A点获得一速度v ,在轨道内做完整的圆周运动,且小球在A点时速度最大. 0 已知小球所受静电力的大小等于小球的重力大小,重力加速度大小为 g,则下列说法正确的 是( ) A.小球带正电 B.小球在B点时轨道对其弹力大小为m(-5g) C.小球从A点运动到B点的过程中电势能增加2mgR D.小球在A点获得的最小速度为 5.(多选)(2022·全国甲卷·21)地面上方某区域存在方向水平向右的匀强电场,将一带正电荷 的小球自电场中P点水平向左射出.小球所受的重力和电场力的大小相等,重力势能和电 势能的零点均取在P点.则射出后( ) A.小球的动能最小时,其电势能最大 B.小球的动能等于初始动能时,其电势能最大 C.小球速度的水平分量和竖直分量大小相等时,其动能最大 D.从射出时刻到小球速度的水平分量为零时,重力做的功等于小球电势能的增加量 6.(多选)(2022·山西太原市一模)图(a)的平行金属板M、N间加有图(b)所示的交变电压, OO′是M、N板间的中线,当电压稳定时,板间为匀强电场.T时,比荷为k的带电粒子甲 从O点沿OO′方向、以v 的速率进入板间,T时飞离电场,期间恰好不与极板相碰.若在 0 T时刻,带电粒子乙以2v 的速率沿OO′从O点进入板间,已知乙粒子在运动过程中也恰 0 好不与极板碰撞,不计粒子受到的重力,则下列说法中正确的是( ) A.T时刻,乙粒子离开电场 B.乙粒子的比荷为C.甲、乙两粒子通过电场偏转的位移大小之比为2∶3 D.甲、乙两粒子通过电场偏转的位移大小之比为1∶2
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  1. CONNECT:[ UseTime:0.000600s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000779s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000292s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000281s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000465s ]
  6. SELECT * FROM `set` [ RunTime:0.001170s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000660s ]
  8. SELECT * FROM `wendang` WHERE `id` = 372540 LIMIT 1 [ RunTime:0.000546s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 372540 [ RunTime:0.029341s ]
  10. UPDATE `wendang` SET `lasttime` = 1773109158 WHERE `id` = 372540 [ RunTime:0.002318s ]
  11. SELECT * FROM `wendang` WHERE `id` < 372540 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002518s ]
  12. SELECT * FROM `wendang` WHERE `id` > 372540 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000603s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 372540 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002954s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 372540 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001635s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 372540 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.016668s ]
0.156767s