Why is copper wire not commonly used in potentiometers?

[harini_5]

I’ve learned that copper wire is not generally used in a potentiometer. Is there any specific reason for this?

 

[TVP45]

Generally the big problems you would face in using copper are: (1) low resistivity; (2) work-hardening; and (3) the formation of copper oxide. All of these could be overcome, but it's so much easier to just use resistance wire.

 

[charng]

There are a few reasons why copper wire is not commonly used in potentiometers. One reason is that copper has a relatively low resistance compared to other materials used in potentiometers, such as nichrome or constantan. This low resistance can result in inaccurate readings and less precise control of the voltage or current being measured.

Another factor is that copper is a highly conductive material, meaning it allows electricity to flow through it easily. This can lead to unwanted interference and noise in the circuit, which can affect the accuracy of the potentiometer's readings.

Additionally, copper is a soft metal and can easily be bent or damaged, making it less durable for use in potentiometers. Other materials used in potentiometers, such as constantan, have higher tensile strength and are better suited for withstanding the wear and tear of regular use.

Overall, while copper wire may be suitable for other electrical applications, it is not the most ideal material for use in potentiometers due to its low resistance, high conductivity, and lower durability compared to other options.