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Question:

Why do light bulbs must use tungsten wire?

Why do light bulbs must use tungsten wire?

Answer:

At such high temperatures other substances can not maintain their own performance temperature, but the tungsten wire melting point of more than 5000 degrees, fully able to withstand such a temperature.
The tungsten wire heated to thousands of degrees of high temperature, and then in such a high temperature, tungsten light.
Because the melting point of tungsten high ah. The essence of incandescent lamp is through the energy into heat,

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