2021钦州高二下学期期末考试物理试题扫描版含答案
展开这是一份2021钦州高二下学期期末考试物理试题扫描版含答案，共9页。
钦州市2021年春季学期教学质量监测参考答案
高二 物 理
一、单项选择题（24分）
题号 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
答案 | C | A | D | B | B | D | A | C |
二、多项选择题（16分）
题号 | 9 | 10 | 11 | 12 |
答案 | BD | BC | AC | AD |
13.（每空3分，共6分） （1）变小 （2）100
14.（每空3分，共9分） （1）小球2的落点到管口的水平距离
（2） （3）
15.（8分）解析：
（1）感应电动势最大值
······················································2分
表达式为 ················································2分
（2）有效值 ························································1分
由闭合电路欧姆定律得 ·····································1分
电阻上所消耗的电功率 ······································2分
16.（10分）解析：
（1）金属杆速度最大时产生的感应电动势为 ① ···························1分
感应电流为 ② ···························1分
金属杆所受的安培力大小为 ③ ····························1分
根据平衡条件可得 ④ ···························1分
联立①②③④并代入数据解得 ································1分
（2）设杆从静止开始运动至最大速度的过程中回路产生的总电热为，
根据功能关系可得 ⑤ ··································2分
根据焦耳定律可得 ⑥ ·································2分
解得 ····················································1分
17．（12分）解析：（1）设球质量，球下滑的过程， ·························1分
代入数据可解得 ·································1分
（2）设球的质量为，球进入水平轨道之后与弹簧正碰并压缩弹簧，当、相距最近时，两球速度相等，弹簧的弹性势能最大，设此时、的速度为，
由动量守恒得 ············································2分
由能量守恒可得弹簧的弹性势能 ······························2分
联立方程，代入数据可解得 ··································1分
（3） 当弹簧恢复原长时，设、的速度分别为、，之后、分离，这也就是它们的最终速度，由动量守恒可得 - 2分
再根据能量守恒可得 ·······································2分
联立两式，代入数据可解得， ·································1分
18．（1）（5分）ABC
（2）（10分）①气体做等压变化，则对于封闭气体，初状态，
，， ····················································1分
末状态， ················································1分
由盖-吕萨克定律得，········································2分
解得 ···················································1分
②气体对外界做的功
·······················································2分
根据热力学第一定律 ·······································2分
解得 ····················································1分
19．（1）（5分）ACE
（2）（10分）①光束通过介质的光路如图：由光路图可知，最外侧光线射出介质的折射角最大，此时入射角为，折射角为，由折射定律可得
···························2分 ····················2分
解得 ······································································1分
②设中心光线在透明固体介质中传播的速度为、时间为；
离开介质到点传播的距离为、时间为，则有
······························1分 ······························1分
················1分 ······························1分
则 ·····························································1分
相关试卷
这是一份2020钦州高二下学期期末物理试题扫描版含答案
这是一份2021钦州高一下学期期末考试物理试题扫描版含答案，共9页。
这是一份2021吉安高二下学期期末考试物理试题扫描版含答案，文件包含江西省吉安市2020-2021学年高二下学期期末考试物理试题图片版pdf、吉安版高二物答pdf等2份试卷配套教学资源，其中试卷共9页， 欢迎下载使用。
