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Why can't we use aluminium or copper under the induction cook pot?

9 Answers

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The most suitable material to use under induction cook pot is iron.We cannot use aluminum or copper because:

1.)Induction cook pot works through electromagnetic induction to produce heat.Neither aluminum nor copper can undergo electromagnetic induction hence making iron suitable.

2.)Iron has a very high electric resistivity compared to aluminum and copper.

3.)Working with aluminum requires production of heavy currents unlike when you're using iron this making the whole process very costy.
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Copper and aluminum are very good conductors which means they produce very little heat. Iron is not a very good conductor which means it produces more heat. Since you want to produce heat, you use iron, not copper or aluminum.
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Basically we need induction to generate currents and we also need enough resistance to produced heat by the induced current. Copper and aluminium are very good conductors and that means they offer very little resistance and thus heat generation is negligible. 
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When used separately, aluminum and copper do not operate on standard induction cooktops due to their magnetic and electrical properties. Copper and aluminum cookware have a deeper skin than steel because they are not magnetic but carry electricity more effectively.
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Aluminum and copper are not suitable for use under induction cook pots because they are not magnetic materials. Induction cooktops use electromagnetic energy to transfer heat to the bottom of the cook pot, so the cook pot must be made from a magnetic material like cast iron or stainless steel in order for the induction cooktop to work properly.
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Aluminium and copper are not suitable for use with induction cooktops because they are not magnetic materials. Induction cooktops use a magnetic field to heat the cookware, so only ferromagnetic materials, such as iron and stainless steel, can be used with these cooktops.
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Under the induction cook pot, aluminium or copper would not work because they are not compatible with the induction heating region.
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Induction will not heat copper or aluminum vessels because the electromagnetic field cannot produce a concentrated current, but cast iron, enameled, carbon steel and stainless steel pans usually work. Any vessel can be used if placed on a suitable metal disk which functions as a conventional hotplate.
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Induction tops typically will not heat copper or aluminum vessels because the electromagnetic field cannot produce a concentrated current, but cast iron, enameled, carbon steel and stainless steel pans usually work. Any vessel can be used if placed on a suitable metal disk which functions as a conventional hotplate.
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