Is a wire carrying current charged?

In what respect does a wire carrying a current differ from a wire, which carries no current?

The wires carrying current in homes have a coating of PVC. Why?

Calculate the force per unit length on a long straight wire caerrying current of 4 A due to a parallel wire carrying 6 A current. Distance between the wires = 3 cm.

A long straight wire carrying current of 25 A rests on a table as shown in Fig. EP 4.22. Another wire PQ of length 1m, mass 2.5 g carries the same current but in the opposite direction. The wire PQ is free to slide up and down. To what height will PQ rise?