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【免费下载】高考真题【广东】2025年高考广东卷物理高考真题文档版(含答案)部分试题word版含解析学生版教师版

  • 2026-01-09 20:02:01
【免费下载】高考真题【广东】2025年高考广东卷物理高考真题文档版(含答案)部分试题word版含解析学生版教师版

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2025年普通高中学业水平选择性考试(广东卷)物理试题

1.一颗小行星绕太阳运行,其近日点和远日点与太阳之间的距离分别为地球和太阳之间距离的5倍和7倍。关于该小行星,下列说法正确的是(  )

A.公转周期

B.在该小行星在近日点的加速度是地球公转加速度的

C.从远日点到近日点,小行星受太阳引力,逐渐减小

D.从远日点到近日点,小行星线速度逐渐减小

2.图是某种同步加速器的原理图。直线通道有电势差为的加速电场,通道转角处有可调的匀强偏转磁场。电量为,质量为的带电粒子以速度进入加速电场,而后可以在通道中循环加速。带电粒子在偏转磁场中运动的半径为。忽略相对论效应,下列说法正确的是(  )

A.偏转磁场的磁感应强度方向垂直纸面向里

B.加速一次后,带电粒子的动能增量为

C.加速k次后,带电粒子的动能增量为

D.加速k次后,偏转磁场的磁感应强度为

3.如图所示,在光滑的水平面上,两小球M、N分别受到拉力F1F2的作用,从静止开始在同一直线上相向运动,在t1时刻发生正碰后各自反向运动。已知F1F2始终大小相等、方向相反,从开始运动到碰撞后速度第1次减为0过程中,两小球速度v随时间t变化的关系图,可能正确的是(

A.B.

C.D.

4.可视为质点的小球,沿光滑的冰坑内壁滑出,使小球在水平面内做匀速圆周运动,如图所示。已知圆周运动的轨道半径,小球所在位置切面与水平面夹角,小球质量为,重力加速度取。关于小球,以下说法正确的是(

A.角速度为B.线速度大小为

C.向心加速度大小为D.所受支持力大小为

5.请完成下列实验操作和计算。

(1)在“长度的测量及其测量工具的选用”实验中,用螺旋测微器测量小球的直径,示数如图所示,读数mm。

(2)实验小组利用小车碰撞实验测量吸能材料的性能,装置如图所示,图中轨道由轨道甲和乙平滑拼接而成,且轨道乙倾角较大。

①选取相同的两辆小车,分别安装宽度为1.00 cm的遮光条。

②轨道调节。

调节螺母使轨道甲、乙连接处适当升高。将小车在轨道乙上释放,若测得小车通过光电门A和B的。证明已平衡小车在轨道甲上所受摩擦力及其他阻力。

③碰撞测试

先将小车1静置于光电门A和B中间,再将小车2在M点由静止释放,测得小车2通过光电门A的时间为t2,碰撞后小车1通过光电门B的时间为t1。若t2t1,可将两小车的碰撞视为弹性碰撞。

④吸能材料性能测试。

将吸能材料紧贴于小车2的前端。重复步骤③。测得小车2通过光电门A的时间为10.00 ms,两车碰撞后,依次测得小车1和2通过光电门B的时间分别为15.00 ms、30.00 ms,不计吸能材料的质量,计算可得碰撞后两小车总动能与碰撞前小车2动能的比值为(结果保留2位有效数字)。

6.科技小组制作的涡流制动演示装置由电磁铁和圆盘控制部分组成。

图(a)是电磁铁磁感应强度的测量电路。所用器材有:电源E(电动势15V,内阻不计);电流表A(量程有0.6A和3A,内阻不计);滑动变阻器RP(最大阻值100Ω);定值电阻R0(阻值10Ω);开关S;磁传感器和测试仪;电磁铁(线圈电阻16Ω);导线若干。图(b)是实物图,图中电机和底座相固定,圆形铝盘和电机转轴相固定。

请完成下列实验操作和计算。

(1)(1)量程选择和电路连接。

①由器材参数可得电路中的最大电流为A(结果保留2位有效数字),为减小测量误差,电流表的量程选择0.6A挡。

②图(b)中已正确连接了部分电路,请在虚线框中完成RPR0和A间的实物图连线

(2)(2)磁感应强度B和电流I关系测量。

①将图(a)中的磁传感器置于电磁铁中心,滑动变阻器RP的滑片P置于b端。置于b端目的是使电路中的电流,保护电路安全。

②将滑片P缓慢滑到某一位置,闭合S。此时A的示数如图所示,读数为A。分别记录测试仪示数BI,断开S。

③保持磁传感器位置不变,重复步骤②。

④下图是根据部分实验数据描绘的BI图线,其斜率为mT/A(结果保留2位有效数字)。

(3)制动时间t测量。

利用图(b)所示装置测量了t,结果表明B越大,t越小。

7.铸造金属元件时,通过往进气口打气,将下方金属液体压进上方预热过的铸型室。其中铸型室与下方装金属液的气室形状都为柱体,铸型室底面积,高,铸型室底部与下方液面差初始为,上方出气口与大气连通,大气压强,下方气室的底面积,金属液体密度。管道面积忽略不计。

(1)当铸型室刚好充满金属液时,求下方液面下降高度与下方气室内气体压强

(2)将出气口关闭铸型,当上方铸型室液面高为时,求下方气室内气体压强

8.用开瓶器拔出瓶中的木塞,初始时软木塞的上截面与玻璃瓶口平齐,木塞质量为,高为h,过程中做匀加速直线运动,加速度为a过程中木塞受到的摩擦力为,其中为参数,h为木塞高,x为木塞运动的距离。开瓶器齿轮的半径为r,重力加速度为

(1)求拔出时,齿轮的角速度ω

(2)求初始到拔出,开瓶器对木塞做的功W

(3)设经过时间为t,求开瓶器的功率Pt的关系式。

9.一矩形上下方有两块长为d的绝缘板,左、右方有两块带电金属板,两端电势差为u,一质量为m,带正电的粒子从矩形左上角静止释放后往矩形内运动,第一次与下方绝缘板碰撞,碰撞处与左侧距离为l

(1)求带电量q

(2)当粒子与绝缘板第一次碰撞后,粒子带电量变为Q,碰后瞬间粒子合外力与运动方向垂直,碰撞后水平方向速度不变,竖直速度大小变为原来的k倍(),求带电量Q

(3)在静止释放后,从开始到第二次与绝缘板碰撞过程中,求电场力对粒子做的功W

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  1. CONNECT:[ UseTime:0.001183s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001802s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.004916s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002118s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001469s ]
  6. SELECT * FROM `set` [ RunTime:0.009011s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001634s ]
  8. SELECT * FROM `article` WHERE `id` = 459912 LIMIT 1 [ RunTime:0.022524s ]
  9. UPDATE `article` SET `lasttime` = 1768014952 WHERE `id` = 459912 [ RunTime:0.044119s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.006414s ]
  11. SELECT * FROM `article` WHERE `id` < 459912 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.029561s ]
  12. SELECT * FROM `article` WHERE `id` > 459912 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002534s ]
  13. SELECT * FROM `article` WHERE `id` < 459912 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.029469s ]
  14. SELECT * FROM `article` WHERE `id` < 459912 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004372s ]
  15. SELECT * FROM `article` WHERE `id` < 459912 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.023268s ]
0.356607s