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Copper wires are an integral part of any electrical setup. It’s hard to imagine a modern electronic appliance without one. They’re very malleable, have good conductivity, excellent corrosion resistance, and are relatively inexpensive. They also solder very well, and are quite durable. However, they can crumble if they’re exposed to too much heat. Fortunately, this is easy to prevent.

Unlike steel, copper is not magnetic. This is because its atoms are packed very tightly together. Therefore, it has high relative atomic mass and high density in the solid state (density = mass/volume). Copper is also diamagnetic because it has no unpaired electrons. In contrast, pure iron is ferromagnetic due to its unpaired electrons.

The current in a copper wire is proportional to its voltage, so the energy it delivers will vary as the voltage changes. It’s important to know how much current is flowing through a copper wire so you can calculate its power. To do this, you need to know its resistance and current density.

To determine the current flowing through a copper wire, you must first know its resistance. Then, you can calculate its current density.

The density of a copper wire is equal to the product of its length and diameter. It’s also equal to its electrical resistivity times its ohm-meter value.

Boulder, Colorado-based YesWelder is gaining a following among American welders with its Hong Kong-sourced welding products. Its MIG welding wire, for example, has a reputation for good feeding and is able to produce welds that are as strong and as beautiful as those made with more expensive American brands.