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第13章第4练 传感器 实验:利用传感器制作简单的自动控制装置_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹

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第13章第4练 传感器 实验:利用传感器制作简单的自动控制装置_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹
第13章第4练 传感器 实验:利用传感器制作简单的自动控制装置_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹
第13章第4练 传感器 实验:利用传感器制作简单的自动控制装置_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹
第13章第4练 传感器 实验:利用传感器制作简单的自动控制装置_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹

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1.(多选)在如图所示的电路中,当用半导体材料做成的热敏电阻浸泡到热水中时,电流表示 数增大,则说明( ) A.在温度越高时,热敏电阻阻值越小 B.在温度越高时,热敏电阻阻值越大 C.半导体材料温度升高时,导电性能变差 D.半导体材料温度升高时,导电性能变好 2.(多选)霍尔元件的示意图如图所示,一块通电的铜板放在磁场中,铜板的前、后板面垂直 于磁场,板内通有如图方向的电流,a、b是铜板上、下边缘的两点,则( ) A.电势φ>φ a b B.电势φ>φ b a C.电流增大时,|φ-φ|增大 a b D.其他条件不变,将铜板改为NaCl溶液时,电势结果仍然一样 3.如图是利用太阳能给LED路灯供电的自动控制电路的示意图.R是光敏电阻,R 是保护 0 定值电阻,日光充足时,电磁继电器把衔铁吸下,GH接入电路,太阳能电池板给蓄电池充 电,光线不足时,衔铁被弹簧拉起,与EF接入电路,蓄电池给LED路灯供电,路灯亮起, 下列关于该电路分析正确的是( ) A.该光敏电阻阻值随光照强度增大而增大 B.增加电源电动势可以增加路灯照明时间C.增大保护电阻R 阻值可延长每天路灯照明时间 0 D.并联更多的LED路灯可延长每天路灯照明时间 4.(2022·河北卷·12)某物理兴趣小组利用废弃电饭煲的部分器材自制简易电饭煲,设计电路 如图甲所示.选用的器材有:限温开关S(手动将其按下,开始持续加热煮饭,当锅内温度 1 高于103 ℃时自动断开,之后不能自动闭合);保温开关S(当锅内温度高于80 ℃时自动断 2 开,温度低于70 ℃时自动闭合);电饭煲的框架(结构如图乙所示).自备元件有:加热电阻 丝R(阻值为60 Ω,用于加热煮饭);限流电阻R 和R(阻值均为1 kΩ);指示灯L 和L(2.5 1 2 1 2 V,0.6 W,当电流低于30 mA时可视为熄灭);保险丝T. (1)按照兴趣小组设计的电路,下列说法正确的是________(多选). A.按下S,L 和L 均发光 1 1 2 B.当锅内温度高于103 ℃时,S 自动断开,L 和L 均发光 1 1 2 C.保温过程中,S 自动在闭合、断开状态之间交替切换 2 D.当锅内温度低于70 ℃时,S 自动闭合,L 发光,L 熄灭 2 1 2 (2)简易电饭煲制作完成后,试用时L 始终不亮,但加热和保温功能均正常.在不增加元件 1 的前提下,断开电源,使用多用电表判断发生故障的元件.下列操作步骤的正确顺序是 __________(填写各步骤前的字母). A.将选择开关旋转到“×100”位置 B.将两支表笔直接接触,调节“欧姆调零旋钮”,使指针指向欧姆零点 C.调整“指针定位螺丝”,使指针指到零刻度 D.测量指示灯L 两端的阻值 1 E.将选择开关置于OFF位置或交流电压最高挡 操作时,将多用电表两表笔与L 两端接触,若指针如图丙所示,可判断是________断路损 1 坏;若指针如图丁所示,可判断是________断路损坏.(用电路中的元件符号表示) 5.(2023·四川遂宁市模拟)高速路入口都安装有称量汽车重量的地磅.如图甲所示是某工厂 生产的小型地磅结构图和电路图,其中 R是压敏电阻,质量m =500 kg的秤台平放在压敏 0 电阻上,被称汽车停放在秤台上.已知电路中电源电动势为26 V、内电阻r=10 Ω,电流表量程为0.3 A、内阻R =10 Ω,滑动变阻器R′的最大阻值为500 Ω.如图乙是压敏电阻的阻 A 值R随压力F变化曲线.某设计人员对电流表上刻度重新赋值,使之能够从表盘上直接读 出秤台上汽车的质量,他先后进行了以下操作.重力加速度g=10 m/s2. (1)断开开关S,撤去秤台上的汽车,把多用电表的旋钮旋到欧姆挡“×10挡”,通过正确 调零后,用红、黑表笔接在压敏电阻两端,多用电表的表针指到如图丙所示位置,则压敏电 阻R此时的电阻值为________ Ω. (2)闭合开关S,设计人员通过调节滑动变阻器,使电流表读数为0.10 A,并在此处标注为0 kg,则此时滑动变阻器R′接入电路的电阻值为________ Ω;2 500 kg处应标注在______ A 处. (3)设计人员按上述操作逐个刻度赋值后,经长时间使用,发现电池的电动势略有减小、内 电阻有所增大.他重新调节滑动变阻器,使秤台空载时电流表读数仍为0.10 A,然后再去测 量汽车的重量.您认为现在的测量值相比汽车真实重量________(选填“偏大”“偏小”或 “不变”) 6.(2023·上海市模拟)力传感器是高中物理实验中常见的一种传感器,它通过敏感元件把待 测力这一物理量转化为相应的电信号来进行测量. (1)如图(a)所示,R、R、R、R 为四个完全相同的应变片,弹性梁在外力的作用下产生形变 1 2 3 4 时,应变片随之被拉伸或压缩,拉伸时电阻值变大,压缩时电阻值变小.现将 R 、R 两个 2 3 应变片粘贴在弹性梁的上表面,R、R 两个应变片粘贴在弹性梁的下表面.当弹性梁右端受 1 4 力向下弯曲时,R 、R 的电阻值________,R 、R 的电阻值________(均选填“变大”“变 2 3 1 4 小”或“不变”). 采用如图(b)所示的电路图测量电路,已知电源电动势为E,内阻不计.每片应变片的初始电阻为R.当弹性梁右端受到外力作用,四个应变片电阻变化量的绝对值均为Δx,则A、B两 0 端的电压U =__________________. AB (2)如图(c)所示为半导体薄膜压力传感器的电阻值 R随压力F变化的图线.读图可知,压力 为1 N时该图像的斜率为__________ kΩ/N,压力为5 N时该图像的斜率为________ kΩ/N.要 使传感器对力的变化测量较为灵敏,应选择在区间__________(选填“1 N”或“5 N”)附近.
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  1. CONNECT:[ UseTime:0.000910s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000859s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000321s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000256s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000485s ]
  6. SELECT * FROM `set` [ RunTime:0.000592s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000599s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373697 LIMIT 1 [ RunTime:0.000428s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373697 [ RunTime:0.031105s ]
  10. UPDATE `wendang` SET `lasttime` = 1773120197 WHERE `id` = 373697 [ RunTime:0.001607s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373697 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001252s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373697 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001246s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373697 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007359s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373697 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004409s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373697 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004650s ]
0.208305s