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

Is a wire carrying current charged?

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.

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

Two wires carry current in different directions. They will: