根据新课标要求改进原电池实验

Improving the experiment of primary cell experiment to meet the requirement of new course standard

按照新课程标准的要求,针对高中物理粤版选修教材中存在的不足,在制作原电池方面做了相应的改进.用重铬酸钾做电解质溶液中的氧化剂,用蓬松棉做盐桥,并用碳棒做电池正极.同时将该方法制做的原电池引入探究原电池内电压和外电压的关系和电池内电阻的大小2个实验中.

Using permanent magnet to excite the superconducting sample, the induced superconducting circulation does not decay. Based on this theory, the high temperature superconducting circulation demonstration instrument is made. It can demonstrate zero resistance, circulation magnetic field and the relation between the resistance of superconducting sample and temperature.