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【湖南省长沙市一中2024-2025学年高一第二学期期末考试物理试卷word版+pdf

  • 2026-04-16 16:37:26
【湖南省长沙市一中2024-2025学年高一第二学期期末考试物理试卷word版+pdf

出卷:刘汉文审题:罗可欣

时量:75分钟满分:100分

单项选择题(本大题共6个小题,每小题4分,共24分。在每小题给出的选项中只有一个选项符合题意)

l.下列关于电荷的说法正确的是

A.点电荷是一种理想化模型,实际不存在

B.物体所带的电荷量可以是任意值

C.只有很小的带电体才可以叫做点电荷

D.摩擦能起电,是因为摩擦创造了新的电荷

2.如图所示是某种手机电池外壳上的文字说明,则下列说法正确的是

A.该电池的容量为252 C

B.该电池待机时的平均工作电流约为14.58 mA

C. mA· h 与J均属于能量的单位

D.mA和 h都是国际单位制中的基本单位

3.静电场中某一电场线与x轴重合,电场线上各点的电势(在c轴上的分布如图所示,图中曲线关于坐标原点О对称。在:轴上取A、B、C、D四点,A和D、B和C分别关于O点对称。下列说法正确的是

A.C点的电场强度方向与x轴正方向相反

B.将带负电的试探电荷从A点移到B点,静电力做负功

C.C、D两点的电场强度Ec>Ep

D.同一试探电荷在B点和C点具有的电势能相等

4.一简易静电除尘器如图所示,静电高压电源的负极与矿泉水瓶中的铜丝连接,正极连接铝片,充入烟尘,通电后烟尘在电场中通过某种机制带电,被吸附在铝片上,达到除尘效果。则下列说法正确的是

A.烟尘在电场中带上的是正电

B.矿泉水瓶内越靠近铜丝的位置,电势越高

C.带电后,烟尘向铝片运动的过程中,电势能越来越小

D.带电后,烟尘向铝片运动的过程中,所受电场力越来越大

5.如图所示,带正电的小球P与光滑的小定滑轮О固定在同一竖直面上,用绕过滑轮О的绝缘轻质细线拉住带电小球Q,Q静止时两球恰好位于同一水平面,且PQOP。现用力拉细线上端使Q缓慢上移,直至PQ连线与水平方向的夹角为60°,此过程中P、Q两球的带电荷量保持不变。则下列说法正确的是

A.P、Q间的库仑力逐渐减小

B.库仑力对Q一直做正功

C.Q的电势能一直增大

D.细线拉力对Q做的功等于Q重力势能的增加量

6.如图所示,竖直固定的一光滑圆形轨道,OA是水平半径,OB与OA成60°角,一小球从轨道上的A处由静止释放,重力加速度为g,则小球运动到B点时的加速度大小为

A.B.C.D.

二.多选题(共4小题,每小题5分﹐共20分。在每小题给出的四个选项中,有多项符合题目要求。全部选对的得5分,选对但不全的得3分,有选错的得0分)

7.如图甲所示,计算机键盘为电容式传感器,每个键下面由相互平行间距为d 的活动金属片和固定金属片组成,两金属片间有空气间隙,两金属片组成一个平行板电容器,如图乙所示。其内部电路如图丙所示,则下列说法正确的是

A.按键的过程中,电容器的电容减小

B.按键的过程中,电容器的带电量增大

C.按键的过程中,图丙中电流方向从a流向b

D.按键的过程中,电容器两极板间的电场强度增大

8.北斗卫星导航系统由空间段、地面段和用户段三部分组成。空间段由若干静止轨道卫星A、倾斜同步轨道卫星B和中轨道卫星C组成。如图所示,三类卫星都绕地球做匀速圆周运动,卫星C距地面高度为hc,地球自转周期为T,地球半径为R,地球表面重力加速度为g,引力常量为G。则下列说法正确的是

A.卫星A距地面高度为B.卫星B的加速度大小为

C.地球的密度D.卫星C的线速度大小

9.示波器的核心部件是示波管,示波管由电子枪、偏转电极和荧光屏组成,其原理图如图甲所示。下列说法正确的是

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  1. CONNECT:[ UseTime:0.000580s ] mysql:host=127.0.0.1;port=3306;dbname=e460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000712s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000311s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000321s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000546s ]
  6. SELECT * FROM `set` [ RunTime:0.000250s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000624s ]
  8. SELECT * FROM `article` WHERE `id` = 509396 LIMIT 1 [ RunTime:0.000660s ]
  9. UPDATE `article` SET `lasttime` = 1776493569 WHERE `id` = 509396 [ RunTime:0.009433s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000329s ]
  11. SELECT * FROM `article` WHERE `id` < 509396 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000495s ]
  12. SELECT * FROM `article` WHERE `id` > 509396 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000548s ]
  13. SELECT * FROM `article` WHERE `id` < 509396 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001889s ]
  14. SELECT * FROM `article` WHERE `id` < 509396 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001585s ]
  15. SELECT * FROM `article` WHERE `id` < 509396 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001884s ]
0.102632s