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初中温度计教学中,主要是液体温度计原理、应用、使用方法,我认为可向学生介绍一些其他类型的温度计。热敏温度计就是一种利用热敏电阻随温度而改变,从而改变串联有热敏电阻的电路里的电流强度而制成的。因而它须和大型示教电表配套使用。目前,中学物理实验室一般均有配备,下面笔者根据自己的教学实践,简单谈一下在演示实验中热敏温度计的应用及要注意的问题。
In the teaching of junior high school thermometers, the principle, application, and use of liquid thermometers are mainly used. I think that students can introduce some other types of thermometers. A thermistor is a type of sensor that uses a thermistor that changes with temperature to change the current in a circuit with a thermistor in series. Therefore, it must be used with a large teaching electric meter. At present, the middle school physics labs are generally equipped. Following the author’s own teaching practice, he briefly discusses the application of thermal thermometers and issues to be noted in the demonstration experiments.