Isn't there something inside the wire like a wire?.
Because of the electrical conductivity of iron is not good, the general wire are copper or aluminum wire, copper wire and aluminum wire conductivity is good, however, the anti bending performance of it is not good, if the regular drag of the occasion, in the aluminum wire and copper wire is easy to break, in order to strengthen the anti bending capacity of cable usually, in Riga strands of a copper wire, if the wire broke, in this part it is easily broken, but if broken in the interface area, the problem is not too much.
There is no wire in a common wire, but one exception is the cable.
The mechanical tension has decreased a little, and if it is an electric wire, it might affect a little bit of electrical flow. Other effects are minor.