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2021年高中二年级高二期末物理超详细静电场练习题.pdf

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1、1 高二物理静电场练习题1.如图所示，MN 是负点电荷电场中的一条电场线，一个带正电的粒子（不计重力）从a 到b 穿越这条电场线的轨迹如图中虚线所示下列结论正确的是AD A带电粒子从a 到 b 运动的过程中动能逐渐减小B带电粒子在a 点时的电势能大于在b 点时的电势能C负点电荷一定位于N 点右侧D带电粒子在a 点时的加速度大于在b 点时的加速度2（通州市2010 届第六次调研）如图所示，三个同心圆是点电荷Q 周围的三个等势面，已知这三个圆的半径成等差数列，A、B、C 分别是这三个等势面上的点，且这三点在同一条电场线上将电量为61.6 10Cq的电荷从 A 点移到 C点，电势能减少51.92 1

2、0J，若取 C点为电势零点（0cV），则 B 点的电势是B A一定等于6V B一定低于6V C一定高于6V D无法确定3.如图所示，一带电粒子在电场中沿曲线AB 运动，从 B 点穿出电场，a、b、c、d 为该电场中的等势面，这些等势面都是互相平行的竖直平面，不计粒子所受重力，则D A该粒子一定带负电B此电场不一定是匀强电场C该电场的电场线方向一定水平向左D粒子在电场中运动过程动能不断减少4.一正点电荷仅在电场力作用下，从 A 点运动到B 点，其速度大小随市时间变化的图像如图所示，下列关于A、B两点电场强度E的大小和电势的高低的判断，正确的是（）B ABABAEE，BBABAEE，CBABAEE

3、，DBABAEE，5.如图所示，P、Q 是电量相等的两个正电荷，它们的连线中点是O，A、B 是 PQ 连线的中B A a b c d M N a b 名师归纳总结|大肚有容，容学习困难之事，学业有成，更上一层楼第 1 页，共 11 页2 垂线上的两点，OAOB，用 EA、EB、A、B分别表示A、B两点的场强和电势，则（）B A.EA一定大于EB，A一定大于BB.EA不一定大于EB，A一定大于BC.EA一定大于EB，A不一定大于BD.EA不一定大于EB，A不一定大于B6.图所示，虚线a、b、c 代表电场中的三个等势面，相邻等势面之间的电势差相等，即 U

4、ab=Ubc,实线为一带正电的质点仅在电场力作用下通过该区域时的运动轨迹，P、Q 是这条轨迹上的两点，据此可知BD(A）三个等势面中，a 的电势最高(B）带电质点通过P点时的电势能较大(C）带电质点通过P 点时的动能较人(D）带电质点通过P点时的加速度较大7.、（如皋市2010 届高三一轮复习）某同学在研究电子在电场中的运动时，得到了电子由a点运动到b 点的轨迹（图中实线所示），图中未标明方向的一组虚线可能是电场线，也可能是等势面，则下列说法正确的判断是AC A如果图中虚线是电场线，电子在a 点动能较大B如果图中虚线是等势面，电子在b 点动能较小C不论图中虚线是电场线还是等势面，a 点的场强都

5、大于b 点的场强D不论图中虚线是电场线还是等势面，a 点的电势都高于b 点的电势8.、（徐州市2010 届摸底考试）如图所示，A、B是一条电场线上的两点，若在A 点释放一初速为零的电子，电子仅受电场力作用，沿电场线从A 运动到 B则A A电场强度的方向向左BA 点场强一定大于B 点场强C电场力做负功D电势能增加9.、（无锡地区2011 届期中检测）在以某电荷为球心的球面上，各点相同的物理量为（）B A 名师归纳总结|大肚有容，容学习困难之事，学业有成，更上一层楼第 2 页，共 11 页文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O

6、7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L

7、1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O

8、7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L

9、1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O

10、7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L

11、1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O

12、7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T43 Q M N CD A电场强度B同一电荷受到的电场力C电势D同一电荷具有的电势能10.如图所示，点电荷固定于Q 点，一带电粒子在库仑力作用下，做以 Q 为焦点的椭圆运动。M、N 为椭圆长轴端点上的两点，下列说法正确的是 ()BDA带电粒子与点电荷的电性相同B带电粒子与点电荷的电性相反C带电粒子在M 点的电势能大于N 点的电势能D带电粒子在M 点的电势能小于N 点的电势能11.（2011 扬州市高三物理期中模拟试卷）如图所

13、示，三条平行等距的虚线表示电场中的三个等势面，电势值分别为10V、20V、30V，实线是一带负电的粒子（不计重力）在该区域内的运动轨迹，对于轨迹上的a、b、c 三点来说AD A、粒子在三点的合力Fa=Fb=Fc；B、粒子必先过a，再到 b，然后到c；C、粒子在三点的动能大小为EKbEKaEKc；D、粒子在三点的电势能大小为EPcEPabBEa Eb/3,，abD Ea3Eb,，ab23.如图所示，a、b 两个带电小球的质量均为m，所带电量分别为+2g 和-q，两球间用绝缘细线连接，a 球又用长度相同的绝缘细线悬挂在天花板上，在两球所在的空间有方向向左的匀强电场，电场强度为E，平衡时细线都被拉紧

14、则平衡时可能位置是图中的C 24.如图所示，在绝缘水平面上固定两个等量同种电荷A、B，在 AB连线上的P 点由静止释放一带电滑块，则滑块会由静止开始一直向右运动到AB连线上的另一点M而停下。则以下判断正确的是()CD A 滑块一定带的是与A、B异种的电荷B滑块的电势能一定是先减小后增大C滑块的动能与电势能之和一定减小DAP间距一定小于BM间距25.如图所示，在一真空区域中，AB、CD是圆 O 的两条直径，在 A、B两点上各放置电荷量为 Q 和 Q 的点电荷，设C、D 两点的电场强度分别为EC、ED，电势分别为C、D，下列说法正确的是C P 名师归纳总结|大肚有容，容学习困

15、难之事，学业有成，更上一层楼第 6 页，共 11 页文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N

16、5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编

17、码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N

18、5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编

19、码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N

20、5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编

21、码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T47 d AEC与 ED相同，C与D相等BEC与 ED不相同，C与D相等CEC与 ED相同，C与D不相等D EC与 ED不相同，C与D不相等26.一带电粒子射入一固定在O 点的点电荷的电场中，粒子运动轨迹如图中虚线所示图中的实线是以O 为圆心等间距的同心圆，a、c 是粒子运动轨迹与同一圆

22、的交点，b 是粒子运动轨迹与小圆的切点，d 是粒子运动轨迹与最大圆的交点，带电粒子仅受电场力，则可以断定 ABD A粒子受到斥力作用B粒子在b 点的加速度为最大C若粒子由a 运动到 b 克服电场力做功为W1，由 b 运动到 d 电场力做功为 W2，则 W2=2W1 D粒子在b 点的速率一定小于在a 点的速率27.如图所示，绝缘水平面上静止着两个质量均为m、电荷量均为+Q 的物体 A 和 B（A、B 均可视为质点），它们间的距离为r，与水平面间的动摩擦因数均为求：（1）物体 A 受到的摩擦力；（2）如果将物体A 的电荷量增至+4Q，则两物体将开始运动，当它们的加速度第一次为零时，物体A、B 各运

23、动了多远的距离？解：（1）由平衡条件可知A 受到的摩擦力f=F库=22rQk（2 分）（2）设 A、B间距离为r当加速度a=0 时，224rQk=mg（3 分）得到mgkQr24（2 分）名师归纳总结|大肚有容，容学习困难之事，学业有成，更上一层楼第 7 页，共 11 页文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7

24、N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档

25、编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7

26、N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档

27、编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7

28、N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档

29、编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T48 由题可知A、B运动距离均为2rrs（3

30、分）故22rmgkQs（2 分）28.在光滑绝缘的水平面上,用长为 2L的绝缘轻杆连接两个质量均为m的带电小球A和B.A球的带电量为+2q,B 球的带电量为-3q,组成一带电系统,如图所示,虚线 MP为 AB两球连线的垂直平分线,虚线NQ与MP平行且相距4L.最初 A和 B分别静止于虚线MP的两侧,距MP的距离均为L,且 A 球距虚线NQ的距离为3L.若视小球为质点,不计轻杆的质量,在虚线MP,NQ间加上水平向右的匀强电场E后,求:(1)B 球刚进入电场时,带电系统的速度大小.(2)带电系统从开始运动到速度第一次为零所需时间以及B球电势能的变化量.29.质量都是m的两个完全相同、带等量异种电荷

31、的小球A、B分别用长l的绝缘细线悬挂在同一水平面上相距为2l的M、N两点，平衡时小球A、B的位置如图甲所示，线与竖直方向夹角=30，当外加水平向左的匀强电场时，两小球平衡位置如图乙所示，线与竖直方向夹角也为=30，求（1）A、B小球电性及所带电量Q；（2）外加匀强电场的场强E。（1）A球带正电，B球带负电 2 分两小球相距d2l 2lsin30 l由A球受力平衡可得：3 分解得：3 分（2）此时两球相距E 4L B A-3+2q M N Q P 名师归纳总结|大肚有容，容学习困难之事，学业有成，更上一层楼第 8 页，共 11 页文档编码:CS4B9Q

32、7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF

33、2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q

34、7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF

35、2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q

36、7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF

37、2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q

38、7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T49 根据A球受力平衡可得：3 分解得：3 分解：带电系统开始运动时，设加速度为a1，由牛顿第二定律：mqEa221mqE（2 分）球 B 刚进入电场时，带电系统的速度为v1，有：Lav1212求得：mqELv21（2 分）对带电系统进行分析，假设球 A 能达到右极板，电场力对系统做功为W1，有：0)23(321LqELqEW故带电系统速度第一次为零时，球A 恰好到达右极板Q。（2

39、分）设球 B 从静止到刚进入电场的时间为t1，则：111avt解得：qEmLt21（1 分）球 B 进入电场后，带电系统的加速度为a2，由牛顿第二定律：mqEmqEqEa22232（2 分）显然，带电系统做匀减速运动。减速所需时间为t2，则有：2120avt求得：qEmLt82（2 分）可知，带电系统从静止到速度第一次为零所需的时间为：qEmLttt2321（1 分）B球电势能增加了6 Eq L（2 分）E 4L B A-3q+2q M N Q P 名师归纳总结|大肚有容，容学习困难之事，学业有成，更上一层楼第 9 页，共 11 页文档编码:CS4

40、B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2

41、 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4

42、B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2

43、 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4

44、B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2

45、 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4

46、B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T410 30.如图所示,AB为竖直墙壁，A 点和 P点在同一水平面上。空间存在着竖直方向的匀强电场。将一带电小球从P 点以速度向 A 抛出，结果打在墙上的C 处。若撤去电场，将小球从 P点以初速 v/2 向 A 抛出，也正好打在墙上的C 点。求：（1）第一次抛出后小球所受电场力和重力之比（2）小球两次到达C点时速度之比（1）设AC=h、电场力为FQ，根据牛顿第

47、二定律得：FQ+mg=ma第一次抛出时，h=2)(21la(1 分)第二次抛出时，h=2)2(21lg(1 分)由、两式得a=4g(1 分)所以，FQ：G=3:1(1 分)（2）第一次抛出打在C 点的竖直分速度y1=a(l)(1 分)第二次抛出打在C点的竖直分速度y2=g(l2)(1 分)第一次抛出打在C点的速度1=212y(1 分)第二次抛出打在C点的速度2=222)2(y(1 分)所以，1：2=2：1(1 分)31.如图甲所示，电荷量为q=1 10-4C的带正电的小物块置于绝缘水平面上，所在空间存在方向沿水平向右的电场，电场强度E 的大小与时间的关系如图乙所示，、物块运动速度与时间

48、t 的关系如图丙所示，取重力加速度g=10m/s2。求（1）前 2 秒内电场力做的功。（2）物块的质量。（3）物块与水平面间的动摩擦因数。P A B C+E 甲/（m?s-1）t/s O 1 2 3 2 4 t/s O 1 2 3 2 4 E/（104N?C-1）乙丙名师归纳总结|大肚有容，容学习困难之事，学业有成，更上一层楼第 10 页，共 11 页文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H

49、7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文

50、档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H7N5O7A2 ZF2O7L2D6T4文档编码:CS4B9Q7L1D4 HG7H

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本文标题：2021年高中二年级高二期末物理超详细静电场练习题.pdf
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