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第10章实验10 导体电阻率的测量_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_一轮复习85练

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第10章实验10 导体电阻率的测量_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_一轮复习85练
第10章实验10 导体电阻率的测量_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_一轮复习85练
第10章实验10 导体电阻率的测量_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_一轮复习85练
第10章实验10 导体电阻率的测量_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_一轮复习85练
第10章实验10 导体电阻率的测量_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_一轮复习85练

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1.(2023·浙江温州市月考)小亮同学设计了如图甲所示的电路来测量某种电阻丝的电阻率. (1)闭合开关S 、S ,调节电阻箱,当电压表读数为2.00 V时,电流表示数如图乙所示,I= 1 2 ________ A,电阻丝电阻的测量值为________ Ω(保留三位有效数字),此测量值________真 实值(选填“大于”“等于”或“小于”). (2)断开S ,通过改变接线夹接触电阻丝的位置来调节接入电路中电阻丝的长度,并通过改 2 变电阻箱的阻值,使电流表示数保持不变.记录接入电路中电阻丝的长度L和对应电阻箱的 阻值R,作出“R-L”图线,如图丙所示.电阻丝的电阻率记为ρ、直径记为d,图线斜率 的绝对值为k,则电阻率的表达式ρ=________. (3)小亮同学测出金属丝的直径d=0.35 mm,由此可求得金属丝的电阻率为________ Ω·m(计 算结果保留两位有效数字). 2.(2023·湖南省雅礼中学模拟)一根细长均匀、内芯为绝缘材料的金属管线样品,横截面外 缘为正方形,如图甲所示.此金属管线样品长约30 cm、电阻约10 Ω,已知这种金属的电阻 率为ρ,因管芯绝缘材料截面形状不规则,无法直接测量其横截面积.请你设计一个测量管 芯截面积S的电学实验方案,现有如下器材可选:A.毫米刻度尺 B.螺旋测微器 C.电流表A(量程0~600 mA,内阻约为1.0 Ω) 1 D.电流表A(量程0~3 A,内阻约为0.1 Ω) 2 E.电压表V(量程0~3 V,内阻约为6 kΩ) F.滑动变阻器R(2 kΩ,允许通过的最大电流0.5 A) 1 G.滑动变阻器R(10 Ω,允许通过的最大电流2 A) 2 H.蓄电池E(电动势为6 V,内阻约为0.05 Ω) I.开关一个、带夹子的导线若干 (1)上述器材中,应该选用的电流表是________,滑动变阻器是________(填写选项前字母代 号). (2)若某次用螺旋测微器测得样品截面外缘正方形边长如图乙所示,则其值为________ mm. (3)要求尽可能测出多组数据,你认为在图丙、丁、戊、己中选择的电路图是________. (4)若样品截面外缘正方形边长为a、样品长为L、电流表示数为I、电压表示数为U,则计 算内芯截面积的表达式为S=________________. 3.(2023·江苏南通市模拟)小明通过实验测量一种合金的电阻率.(1)如图甲所示,用螺旋测微器测量合金丝的直径时,从调节到读数的过程中,螺旋测微器 上三个部件A、B、C使用的先后顺序应该为____________(填字母);测得该合金丝的直径为 d=________ mm; (2)请根据表格中数据,在图乙中用笔画线代替导线把电路连接补充完整; 1 2 3 4 5 6 7 电流I/A 0 0.08 0.11 0.15 0.19 0.27 0.38 电压U/V 0 0.19 0.29 0.44 0.60 0.80 1.15 (3)小明在实验室找了两节干电池进行实验,正确连接电路后,发现调节滑动变阻器,电压 表和电流表的示数变化范围非常小,原因是____________________________________; (4)正确连接电路后,小明利用刻度尺测出合金丝接入电路的长度L=59.99 cm,闭合开关, 调节滑动变阻器,读出多组电压表和电流表的示数,在方格纸上作出U-I图像如图丙,发 现图像是一条倾斜直线,计算该合金丝电阻R=______________ Ω,该合金丝电阻率ρ= __________ Ω·m(π取3,结果均保留2位有效数字). 4.(2023·湖南长沙市长郡中学高三模拟)为测量甲、乙金属丝的电阻率,小明同学设计了如 图(a)、(b)所示的两种实验方案,已知电源的电动势E和内阻r在实验过程中保持不变. (1)小明先进行了如图(a)方案的测量; ①他首先利用游标卡尺和螺旋测微器分别测出甲、乙两根不同金属丝的直径,示数分别如图 (c)、图(d)所示.则两根金属丝直径的测量值分别为:d =________ mm、d =________ 甲 乙 mm;②实验过程中,小明先将甲金属丝接入电路,并用米尺测出甲金属丝接入电路中的长度 l= 50.00 cm.闭合开关后移动滑动变阻器的滑片分别处于不同的位置,并依次记录了两电表的测 量数据如下表所示,其中5组数据的对应点他已经标在如图(e)所示的坐标纸上,请你标出 余下一组数据的对应点,并在图(e)中画出U-I图线; 实验次数 1 2 3 4 5 6 U/V 0.90 1.20 1.50 1.80 2.10 2.40 I/A 0.18 0.24 0.30 0.37 0.43 0.49 ③该方案测得的甲金属丝的电阻率ρ=__________ Ω·m(π取3.14,计算结果保留两位有效数 字); (2)小明又用如图(b)方案测量乙金属丝的电阻率,实验中他可以通过改变接线夹(即图(b)中滑 动变阻器符号上的箭头接触金属丝的位置),以控制接入电路中金属丝的长度; ①实验操作步骤: a.正确连接电路,设定电阻箱的阻值,闭合开关 b.读出电流表的示数,记录接线夹的位置 c.断开开关,测出接入电路的金属丝的长度 d.闭合开关,重复b、c的操作 ②根据测得电流与金属丝接入长度关系的数据,绘出如图(f)所示的关系图线,由图可以算出 图线的斜率为k,已测得乙金属丝的直径为d ,已知电源的电动势为E、内阻为r.则乙金属 乙 丝的电阻率为________________________;(写出电阻率的计算式)(3)电表的内阻可能使实验产生系统误差,图(b)方案电阻率测量值________(选填“大于” “小于”或“等于”)真实值.
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  1. CONNECT:[ UseTime:0.000834s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000846s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000318s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000283s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000575s ]
  6. SELECT * FROM `set` [ RunTime:0.000201s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.000612s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373452 LIMIT 1 [ RunTime:0.000605s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373452 [ RunTime:0.011427s ]
  10. UPDATE `wendang` SET `lasttime` = 1773118173 WHERE `id` = 373452 [ RunTime:0.000586s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373452 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000512s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373452 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000972s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373452 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000849s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373452 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001448s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373452 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000973s ]
0.172993s