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【简答题】
1821年,德国物理学家赛贝克发现,把两种不同的金属导体接成闭合电路时,如果把它的两个接点分别置于温度不同的两个环境中,则电路中就会产生一个电势,导致有电流产生。这一现象称为塞贝克(Seebeck)效应,这样的电路叫做温差电偶,即热电偶,这种情况下产生电流的电动势叫做热电动势。例如,铁与铜的冷接头为1°C,热接头处为100°C,则有5.2毫伏的热电动势产生。 塞贝克效应用途很广泛,在生产、科学研究及日常生活中温差电偶常被用来测量温度(如冶炼及热处理炉的高温)、辐射强度、电流等物理量。 课堂上,我们学习过塞贝克效应吗?如果的话,是我们的什么东西?_________________________
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