【摘 要】
：
为了演示电与热的关系,达到既定的教学目标,笔者自制了“电热气体压力温度演示器”。如图1所示,在宽口瓶的橡胶胶盖上开4个小孔,1个孔插入1根玻璃管,1个孔插入1段铝芯线,还有
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为了演示电与热的关系,达到既定的教学目标,笔者自制了“电热气体压力温度演示器”。如图1所示,在宽口瓶的橡胶胶盖上开4个小孔,1个孔插入1根玻璃管,1个孔插入1段铝芯线,还有2个小针孔用来引出导线。瓶中装少量红水,并用导线连接1个由电阻丝做成的电阻。铝芯线的作用:
In order to demonstrate the relationship between electricity and heat, to achieve the established teaching goals, the author made “electrical gas pressure temperature demonstrator”. As shown in Fig. 1, four small holes are opened in the rubber cap of the wide mouth bottle, one hole is inserted into one glass tube, one hole is inserted into one section of aluminum core wire, and two small pin holes are used to lead out. wire. The bottle contains a small amount of red water, and a wire is used to connect a resistor made of resistance wire. The role of aluminum core wire:
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