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第11章专题强化练210 带电粒子在组合场中的运动_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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第11章专题强化练210 带电粒子在组合场中的运动_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第11章专题强化练210 带电粒子在组合场中的运动_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第11章专题强化练210 带电粒子在组合场中的运动_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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1.(多选)(2023·辽宁沈阳市模拟)圆心为O、半径为R的圆形区域内存在磁感应强度大小为 B、方向垂直纸面的匀强磁场(未画出),磁场边缘上的A点有一带正电粒子源,半径OA竖 直,MN与OA平行,且与圆形边界相切于B点,在MN的右侧有范围足够大且水平向左的 匀强电场,电场强度大小为E.当粒子的速度大小为v 且沿AO方向时,粒子刚好从B点离开 0 磁场,不计粒子重力和粒子间的相互作用,下列说法正确的是( ) A.圆形区域内磁场方向垂直纸面向外 B.粒子的比荷为 C.粒子在磁场中运动的总时间为 D.粒子在电场中运动的总时间为 2.(多选)(2023·广东省模拟)如图所示的平面直角坐标系xOy,在y轴的左侧存在沿y轴负方向 的匀强电场.在y轴的右侧存在垂直坐标平面向外的匀强磁场.一比荷为 k的带正电粒子 (不计重力)从x轴上的A点以沿着与x轴正方向成θ=53°角的初速度v 开始运动,经过电场 0 偏转从y轴的B点以垂直y轴的速度进入磁场,磁场的磁感应强度大小为,粒子进入磁场后 电场方向变为沿y轴正方向.该带正电粒子经过磁场偏转,粒子先后经过x轴上的C点、y 轴上的D点,粒子经D点后,再次回到x轴上的A点,sin 53°=,cos 53°=,下列说法正确 的是( ) A.粒子在磁场中做匀速圆周运动的轨迹半径为d B.A、C两点之间的距离为3d C.匀强电场的电场强度为 D.粒子从A点开始到再回到A点的运动时间为 3.平面直角坐标系xOy中,第二象限存在沿y轴负方向的匀强电场,电场强度大小为E,第 三、四象限存在垂直坐标平面向里的匀强磁场,如图所示.一质量为m、带电荷量为q的正粒子从坐标为(-L,L)的P点沿y轴负方向进入电场,初速度大小为v =,粒子第二次到达 0 x轴的位置为坐标原点.不计粒子的重力. (1)求匀强磁场的磁感应强度B的大小; (2)若粒子由P点沿x轴正方向入射,初速度仍为v=,求粒子第二次到达x轴时与坐标原点 0 的距离. 4.如图所示,xOy平面内,OP与x轴正方向的夹角为θ=53°,在 xOP 范围内(含边界)存在 垂直于坐标平面向里的匀强磁场,磁感应强度大小为B=0.1 T.第二象限有平行于 y轴向 下的匀强电场,电场强度大小为E=×105 V/m.一带电微粒以速度 v =5×106 m/s从 x 轴 0 上 a(L,0)点平行于OP射入磁场,并从OP上的b点垂直于OP离开磁场,与y轴交于c点, 最后回到x轴上的d点,图中b、d两点未标出.已知L= m,sin 53°=,cos 53°=,不计微 粒的重力,求: (1)微粒的比荷; (2)d点与O点的距离l; (3)仅改变磁场强弱而其他条件不变,当磁感应强度 B 大小满足什么条件时,微粒能到达第 x 四象限. 5.(2023·湖北宜昌市联考)如图所示,在矩形区域ABCD内存在竖直向上的匀强电场,在BC 右侧Ⅰ、Ⅱ两区域存在匀强磁场,L、L、L 是磁场的边界(BC与L 重合),宽度相等,方向 1 2 3 1如图所示,区域Ⅰ的磁感应强度大小为B.一电荷量为+q、质量为m的粒子(重力不计)从 1 AD边中点以初速度v 沿水平向右方向进入电场,粒子恰好从B点进入磁场,经区域Ⅰ后又 0 恰好从与B点同一水平高度处进入区域Ⅱ.已知AB长度是BC长度的倍. (1)求带电粒子到达B点时的速度大小; (2)求区域Ⅰ磁场的宽度L; (3)要使带电粒子在整个磁场中运动的时间最长,求区域Ⅱ中的磁感应强度B 的最小值. 2 6.(2023·广东省高三检测)如图所示,半径为R的圆形区域内存在垂直纸面向里的匀强磁场, 圆形区域内ac、df为互相垂直的竖直和水平两条直径,沿df方向距f点为R的g点处固定一 足够长的挡板,挡板与fg方向的夹角α=60°,粒子打到挡板上会被吸收,圆形磁场区域以 外空间存在竖直向上的匀强电场.一质量为 m、电荷量为q的带负电粒子(不计重力)自c点 沿ca方向以速度v射入磁场,经磁场偏转后从f点沿fg方向射出磁场,之后恰好未打在挡 板上,图中已画出粒子在电场中运动的轨迹. (1)求匀强磁场的磁感应强度大小B; 1 (2)求匀强电场的电场强度大小E; (3)若将原电场换为方向垂直纸面向里的匀强磁场,其磁感应强度大小 B =kB(0
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  1. CONNECT:[ UseTime:0.000566s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000790s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000343s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000724s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000484s ]
  6. SELECT * FROM `set` [ RunTime:0.000195s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000746s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373554 LIMIT 1 [ RunTime:0.001424s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373554 [ RunTime:0.002787s ]
  10. UPDATE `wendang` SET `lasttime` = 1773118985 WHERE `id` = 373554 [ RunTime:0.000413s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373554 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002210s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373554 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.003807s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373554 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004333s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373554 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.006138s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373554 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007102s ]
0.105303s