Question

what is the function of the resistance wire and use

Answer 1

the ans is Resistance wire resists the flow of electricity, and converts the electrical energy into heat. The primary function of this wire is as a heating element, and it comes in various forms which include resistance tape, resistance ribbon or resistance strand.
It is important that the resistance wires can maintain performance at very high temperatures and are resistant to corrosion. The wires that can withstand the highest temperatures are nickel alloys – nickel chrome, nickel chromium 80/20, nichrome 60/16. Resistance wires for less demanding temperatures are copper nickel and cupro-nickel, nickel iron and iron chrome aluminium.
their uses are Nichrome, a non-magnetic 80/20 alloy of nickel and chromium, is the most common resistance wire for heating purposes because it has a high resistivity and resistance to oxidation at high temperatures. When used as a heating element, resistance wire is usually wound into coils.
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Answer 2

Resistance wire is used to oppose the flow of current. For Example, If a 3v led is connected to a 9v Battery we use a 'resistor', and the resistance wire is used to make a 'resistor'. And saves Led from fusing or burning up.

It is very simple, resistance means less electric flow in wire, and it saves our component from getting harmed.