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1、1 2022 年高考物理总复习高中物理电学典型问题归纳总结（精华版）一、带电粒子在电场中的运动问题例 1如图所示，离子发生器发射出一束质量为m、电荷量为q的离子，从静止经加速电压1U进行加速(1)求经电场加速后获得速度0v的大小；(2)若经电压加速后，离子从两平行板左侧中间位置A平行两板射入电压2U的偏转电场已知平行板长为L，两板间距离为d，求：离子离开电场前在偏转电场中的运动时间t；离子在偏转电场中受到的电场力的大小F；离子在偏转电场中的加速度；离子在离开偏转电场时的纵向速度yv；离子在离开偏转电场时的速度v的大小；离子在离开偏转电场时的竖直偏移量y；离子离开偏转电场时的偏转角的正切值tan
2、；2 证明离子飞出电场后的速度方向的反向延长线交于两板间的中心点O；要使离子能穿出电场区域，则求两板间所加偏转电压U的范围；若放置一足够大、与两板右侧相距b的竖直屏，求粒子可能到达屏上区域的长度【解析】(1)不管加速电场是不是匀强电场，WqU都适用，所以由动能定理得21012qUmv解得102qUvm.(2)由于偏转电场是匀强电场，所以离子的运动是类平抛运动，即水平方向为速度为v0的匀速直线运动，竖直方向为初速度为零的匀加速直线运动，所以012LmtLvqU；2UEd，2qUFqEd；2qUFammd；文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
3、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
4、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
5、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
6、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
7、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
8、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
9、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W43 221122yqUU LmqvatLmdqUdmU；2222221202142yqd UqL Uvvvmd U；2222211112224qUL UL myatmdqUdU(与带电粒子的qm、无关，只取决于加速电场和偏转电场)；201tan=2yvU LvU d；如图所示，212yat，0Lv t，yvat=，0tanyvyvx，所以2Lx；Eqam，UEd，则2202qULydmv，当2dy时，222012222md vU dUqLL，则两板
10、间所加电压的范围221122222U dU dULL；当2dy时，粒子在屏上偏移的距离最大(设为0y)，则0tan2Lyb而tan=dL，解得0(2)2d LbyL则粒子可能到达屏上区域的长度为(2)d LbL.文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7
11、F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1
12、C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7
13、F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1
14、C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7
15、F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1
16、C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W44 二、带电粒子在磁场中的运动问题例 1（1）若经电压加速后，离子从A点垂直于磁场边界射入宽度为d的匀强磁场中，离子离开磁场时的位置P偏离入射方向的
17、距离为33Ld，如图所示求：离子在磁场中做圆周运动的轨迹半径；匀强磁场的磁感应强度；离子在磁场中做圆周运动的周期；离子在磁场中的运动时间；离子离开磁场时速度偏转的角度的正切值tan.(2)若经电压加速后，离子沿AM方向进入一半径为R、磁感应强度为B的圆形匀强磁场区域，离开磁场后离子将击中屏幕的N点，如图所示 已知M点为屏幕的中心，磁场区域的圆心O在AM的连线上，O点与M点的距离为L.求：文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O
18、4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:
19、CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O
20、4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:
21、CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O
22、4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:
23、CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O
24、4G6 ZQ5Y7F9H1W45 离子在磁场中做圆周运动的轨迹半径；离子在磁场中做圆周运动的周期；离子离开磁场时速度偏转的角度的正切值tan；离子击中的N点与屏幕中心M点的距离；离子在磁场中的运动时间；离子从进入圆形磁场到击中屏幕的总时间【解析】（1）因为222()rdrL=+，所以解得2 33rd；10123122 33qUmvU mmmBqrqdqd；12223mmTdqBU q；1600123600633dmtTTU q；tan=32 3333ddrLdd.文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
25、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
26、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
27、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
28、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
29、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:C
30、D3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4
31、G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W46(2)011221r=mvU qU mmqBqBmBq；2 mTqB；因为tan2Rr，所以-11=2tan2qBRU m则-11tan=tan2tan2qBRU m；-11tantan2 tan2qMNLLBRU m；1112tan22qmBRU mtTqB；20111cos2cos2tan2LRLmtRvU qqBRU m12ttt+111112tan22cos2tan2qmBRU mLmRqBU qqBRU m.例 2：有一个长方体形状的匀强磁场和匀强电场区域，它的截面是边长0.
32、20 mL的正方形，如图所示，其电场强度为54 10 V/mE，磁感应强度22 10 TB-，磁场方向垂直纸面向里，当一束质荷比为文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F
33、9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C
34、9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F
35、9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C
36、9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F
37、9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C
38、9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W47 10=410kg/Cmq的正离子流，以一定的速度从电磁场的正方形区域边界的中点射入时，不计正离子的重力，则：(1)要使离子流穿过电磁场区域而不发生偏转，电场强度的方向如何？离子流的速度多大？(2)在离电磁场区域右边界0.4 m
39、D处有一与边界平行的荧光屏，若撤去电场，离子流击中屏上a点；若撤去磁场，离子流击中屏上b点，求ab间的距离【答案】见解析。【解析】(1)电场方向竖直向下，与磁场构成粒子速度选择器，使离子运动不偏转，则qEqBv，解得72 10 m/sv.文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V
40、7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文
41、档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V
42、7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文
43、档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V
44、7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文
45、档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W48 (2)撤去电场，离子在磁场中做匀速圆周运动，所需向心力为洛伦兹力，于是2vqBvmR，解得0.4 mR离子离开磁场区域
46、边界时，如图甲所示，对偏转角有1sin2LR得30偏转距离123cosm5yRR离开磁场后离子做匀速直线运动，故总的偏转距离为1tanyyD+解得文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G
47、6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD
48、3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G
49、6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD
50、3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G6 ZQ5Y7F9H1W4文档编码:CD3G7U8Z1C9 HT3V7Q3O4G