Because the copper is a good conductor?

Great Electrical Conductivity

Copper has the best electrical conductivity of any metal, except for silver.

A decent electrical conductivity is equivalent to a little electrical obstruction. An electric flow will move through all metals, anyway they actually have some opposition, which means the flow should be pushed (by a battery) to continue to stream. The greater the obstruction, the harder we need to push (and the more modest the current is). Flow streams effectively through copper on account of its little electrical opposition, absent a lot of loss of energy. This is the reason copper wires are utilized in mains links in houses and underground (albeit overhead links tend be aluminum since it is less thick). Where size as opposed to weight is significant, copper is the most ideal decision. Thick copper strip is utilized for lightning conveyors on tall structures like church towers. The copper strip must be thick so it can convey an enormous current without softening.

Copper wire can be twisted into a loop. The loop will create an attractive field and, being made of copper, will not waste a lot of electrical energy. Copper curls can be found in:

Copper  is an element in its own right!!!!

Did you know copper is element. Electric copper wire are alloy of copper to increase strength. Percentage of other metals is decided depending on it use.