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电炉丝具有良好的弹性,电阻率较大,发热时仍有较好的强度,高温条件下不易氧化,而且市场上规格齐全,售价低廉。在实验教学中,有很多用处。 一、作发热器件用 量热器、焦耳定律演示器及其它一些需要发热器件的仪器中,发热器件均可用适当规格的电炉丝代用。注意点:(1)根据实际工作电流I_0选择合适规格(瓦数P)的电炉丝:P≥220I_0。
Electric wire has good elasticity, high resistivity, good strength when it is heated, it is not easy to oxidize under high temperature conditions, and it has complete specifications and low price on the market. There are many uses in experimental teaching. First, for heating devices Calorimeter, Joule’s Law demonstrator and some other devices that require heating devices, heating devices can use the appropriate size of the electric furnace wire instead. Note points: (1) According to the actual operating current I_0 select the appropriate size (wattage P) of the electric wire: P ≥ 220I_0.