Question

which material is used to make the heating coils of electrical heating devices and why

Answer 1

nichrome 80 /20 is an ideal material bcoz it has relatively high resistance and form a adherent layer of chromium oxide when it is heated for the first time .material beneath this layer is not be oxidize and preventing the wire from breaking and burning out .


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Answer 2

The material which is used to make the heating coils of electrical heating devices is called nichrome.

Explanation:

• Nichrome is nothing but an alloy of Nickel and chromium. It has a special characteristics that it has high boiling point as well as melting point and high resistance.
• Due to this reason it is used as a heating coil in electrical heating devices , more the resistance in a wire mode is the heat produced
• As a  result the amount of heat produced in the electrical heating device is more. Since it has high melting point the coil does not melt very easily.

To know more about nichrome,

What is nichrome state its one use. Brainly.in

https://brainly.in/question/2946648