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为了配合中学物理课“电源”一节的教学和第二课堂教学,培养学生创造能力和动手能力,作者自制成温差电效应电池。使用 E_(A2)电偶丝40对串联,热端用酒精灯加热或用聚光镜取太阳光加热,冷端为室温或冷水恒温。制作简单,热端扭接或熔接,冷端扭接。偶丝直径为0.5毫米,长为10厘米,电动势可达2.5～3伏特,烤铜端为正极。如右图:①烤铜丝,②镍铬丝,③热端,④冷端,⑤电绝缘夹板。用作热电池,可演示热能与电能直接转换。用作光电池,可演示光能与电能直接转换。也可作为火焰、高温温度计探头,也可作为温度传感器,还可作电制冷演示。
In order to cooperate with the secondary school physics class “power” section of the teaching and the second classroom teaching, to cultivate students’ creativity and hands-on ability, the author made a thermoelectric effect battery. Use E_(A2) galvanic wire 40 for series connection, hot end heating with alcohol lamp or using condenser lens for solar heating, cold end is room temperature or constant temperature of cold water. Simple to make, hot end twisted or welded, cold end twisted. The wire diameter is 0.5 mm, length is 10 cm, electromotive force is 2.5 to 3 volts, and the roasted copper tip is positive. As shown on the right: 1 roasted copper wire, 2 nickel chrome wire, 3 hot end, 4 cold end, 5 electrically insulated splints. Used as a thermal battery to demonstrate the direct conversion of thermal energy and electrical energy. Used as a photocell to demonstrate the direct conversion of light energy and electrical energy. Can also be used as a flame, high-temperature thermometer probe, can also be used as a temperature sensor, but also for electric refrigeration demonstration.