摘要
高中新课标要求学生能正确操作实验仪器.对于磁电式电表,教材规定,使电压电流表指针偏至满刻度四分之三和使欧姆表指针偏至中值电阻附近读数.借助误差理论进行定量分析,为教师在课堂上能更清楚地讲解此规定的来龙去脉提供参考.
According to the new curriculum standard of senior high school, students are required to operate the experiment instruments correctly. The textbooks require to choose the appropriate range of the magnetic-electric ammeters. It is to make the pointer of ammeter and voltmeter reach 3/4 of the full scale as well as the pointer of ohmmeter reach median resistance. The error theory is used to quantitatively analyze it in order to provide a reference for teachers to explain more clearly about the rules in the classroom.
作者
凌舒愉
吴先球
Ling Shuyu;Wu Xianqiu(School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, Guangdong 510006)
出处
《物理通报》
2017年第12期62-64,共3页
Physics Bulletin
基金
广州市科技和信息化局科普计划项目,项目编号:2014KP000043
关键词
仪器与误差
相对误差
磁电式电表
量程
relative error
magnetic- electric ammeters
range
median resistance
