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诸多版本的物理教材中关于“焦耳定律”的演示实验总不能尽如人意:或者不安全,或者耗时太长,或者效果不太理想,而且都需要分几次实验才能得出结论。下面咱们一起动手制作一个省时、高效、安全,只用一次实验即能得出结论且效果十分明显的“焦耳定律”演示装置。材料准备有机玻璃板(60cmx80cm)一块、细玻璃管(60cm)3根、大号玻璃注射器(动物注射用)3个、输
In many versions of physics textbooks, the experiment on “Joule’s Law ” can not be performed satisfactorily: it is either unsafe, it takes too long, or the effect is not so good, and it needs several experiments to draw conclusions. Here we work together to create a time-saving, efficient, safe, with only one experiment that can be concluded and the effect is very obvious “Joule’s law ” demonstration device. Material Preparation Plexiglass plate (60cmx80cm) a, thin glass tube (60cm) 3, large glass syringe (animal injection) 3, lose