论文部分内容阅读
高中物理必修本第二册第50页稳恒电流这一章中,图2—20是演示“电源电动势等于内、外电路上的电压之和”的原理装置示意图。实验演示时发现:(1)外电路负载用滑动变阻器不便控制(V)表上有稳定的读数;(2)内阻很小,(V’)表指针偏转小,可见度不够;(3)电解液用稀疏酸有腐蚀作用,在配制时比例稍有偏差,实验就难于成功。经过实践,笔
High School Physics, Volume II, Page 50 Constant Current In this chapter, Figures 2–20 are schematic diagrams illustrating the principle of the “power electromotive force equals the sum of the voltages on the internal and external circuits.” During the demonstration of the experiment, it was found that: (1) Inconvenient control of the external circuit load with a sliding rheostat (V) The meter has a stable reading; (2) The internal resistance is very small, (V’) table pointer deflection is small, visibility is not enough; (3) Electrolysis The sparse acid used in the liquid has a corrosive effect, and the proportion is slightly deviated during the preparation, and the experiment is difficult to succeed. After practice, pen