Asia-Pacific Forum on Science Learning and Teaching, Volume 3, Issue 2, Article 9 (Dec., 2002) LAI Lifei, WANG Xiaojun and WU Xianqiu A new way of computing power supply's electromotance and internal resistance

A new way of computing power supply's electromotance and internal resistance

Lifei LAI, Xiaojun WANG and Xianqiu WU

Department of Physics
South China Normal University

Guang Zhou 510631

Email:Wangxjun@hsut.scnu.edu.cn

 

Received 12 July, 2002 (Revised 11 Dec., 2002)

Abstract:

It is the least-squares fit for a straight line that computes more accurately the power supply's electromotance and internal resistance for the high school physics experiment on the measurement of power supply's electromotance and internal resistance. Moreover, using the given C program, it can reduce the time-consuming work and avoid the human error in processing the data using an electronic calculator.

Key Words: Electomotance, internal resistance, least-squares fit, C programming

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