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【高中物理教材实验十七】探究闭合电路中内外电压之间的关系

  • 2026-03-27 00:40:46
【高中物理教材实验十七】探究闭合电路中内外电压之间的关系

广东江凤

【高中物理教材实验十七】

探究闭合电路中内外电压之间的关系

01教材知识点

沪科技版必修三P73

实验背景

本实验以欧姆定律和电路的有关物理知识为基础，通过实验演示，测出电源内外电压，运用归纳方法探究闭合电路中的内、外电压之间的关系，得出电动势的概念 。本实验为学生利用该结论推导闭合电路的欧姆定律奠定了基础。

02实验介绍

实验器材

【数字化仪器】电压传感器

【其他】滑动变阻器、开关、导线、探针、内阻可调电池、注射器、学生电源

03实验过程

实验装置

图片来自上海空中课堂

实验视频

视频来自空中课堂

实验结论分析

本实验中，在误差允许范围内，内外电压之和为定值。

04传感器的运用

上述内容是威尼尔初中化学教材实验的详细说明，如有任何问题，欢迎扫码关注微信官方公众号咨询，我们会及时为您答疑。本实验若有不完善之处，敬请您不吝指正，谢谢

-END-

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  1. CONNECT:[ UseTime:0.000443s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000643s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000290s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000280s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000476s ]
  6. SELECT * FROM `set` [ RunTime:0.000226s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000640s ]
  8. SELECT * FROM `article` WHERE `id` = 463723 LIMIT 1 [ RunTime:0.000773s ]
  9. UPDATE `article` SET `lasttime` = 1775578362 WHERE `id` = 463723 [ RunTime:0.017197s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000757s ]
  11. SELECT * FROM `article` WHERE `id` < 463723 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.002543s ]
  12. SELECT * FROM `article` WHERE `id` > 463723 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.016832s ]
  13. SELECT * FROM `article` WHERE `id` < 463723 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.012329s ]
  14. SELECT * FROM `article` WHERE `id` < 463723 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.061824s ]
  15. SELECT * FROM `article` WHERE `id` < 463723 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.109861s ]
0.311783s