Question

the coils of heating devices are made of alloys rather than pure metals

Answer 1

because metals are very good conductors of heat which will sometimes melt due to the heat or will affect the surface touching the metal wire. alloy are made up of substance which are not good conductors of heat (insulators of heat).

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Answer 2

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b) The conductors of electric heating devices such as bread toasters and electric irons are made of alloy because

◾resistivity of an alloy is more than that of metals.

◾It produces large amount of heat and do not burn easily.

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