Why is coil of heating element of a heater made up of metal?

Answer 1

Because alloys often have "better" properties than the pure metals. They may withstand more heat before melting, be more resistant to oxidizing or mechanically stronger for instance.

Answer

It's made of alloy because they are made of two or more metals(sometimes non-metals also) Which are combined together to produce a metal with cumulative properties of it's constituents.

Answer 2

Alloys are used rather than pure metals in electrical heating devices since they have low electrical conductivity and also a low melting point. Usually the alloys don't have a single melting point; they have a range of melting points. The temperature at which melting begins is called the SOLIDUS and the temperature at which melting is complete is called the LIQUIDUS.

Answer 3

An alloy is a homogenous mixture of a metal with another metal or a non-metal .eg:Bronze

Alloys are used in electrical heating devices rather than pure metals because,these alloys can exhibit or show both the properties of metals as well as non-metals.

or

Alloys are a mixture of a pure metal with one or more other metals or nonmetallic substances (carbon, etc.) in correct proportions that are selected to provide desirable properties for strength, fabrication and resistance to heat as well as resistance to electric current. The alloying matter may be a small amount of the total alloy but should affect the crystals of the pure metal including grain size and matter between grain boundaries. The discovery of ductile tungsten made it possible to use it in heating elements, including light bulb filaments. It was necessary to exclude oxygen and carbon from the pure tungsten to avoid embrittlement, etc.

Answer 4

To enable them to cope with the extreme heat that they generate. The heating elements in toasters and irons can hot up to several hundreds of degrees Centigrade, so for that reason, they need to be made of metals that are resistant enough to cope with that without melting, but which are at the same time light enough for the user to handle them without difficulty. They also need to be made of a metal that does not conduct the heat to other parts of the appliance, which would cause immense damage and be very dangerous.

It would in theory be possible to make them out of some of the heavier pure metals, such as iron (as, indeed, old-fashioned flat-irons were, that were heated on the fire and gave modern 'irons' their name). However, this would make them far too heat-conductive and also too heavy for convenient use.

Answer 5

The heating element conductor is made of an alloy called nichrome (made of Nickel and Chromium) that has very high resistance, which causes it to heat up more than a lower resistance metal would.

Answer 6

A combination of nickel (80%) and chromium (20%) is used. This metal is referred to as Nichrome.

Answer 7

Because they are good conductors of electricity, are ductile and have a high melting point because of sex

Answer 8

this is to prevent short circuit and preventing going directly from one turn to the next.

Answer 9

Because metals are good heat conductors !