What is the purpose of the material surrounding the metal inside the lamp cord?

2 answers:

5 0

The prongs on the plug and the wire inside the cord are metal but they are surrounded by plastic or rubber insulation so you do not get shocked when you touch the cord

alexdok [17]4 years ago

5 0

It is likely that you have noticed that most cords in electrical appliances are surrounded by a material that does not let the metal inside be in touch with us. However, you might not know the purpose of this material. The purpose of this material is to provide insulation. This means that the material is there to offer protection against the flow of an electric current, as well as to protect the metal from environmental threats.

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The value is $\lambda = 900 \ nm$

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