Question

why do we need two metallic wires to complete a circuit​

Answer 1

Answer:

..bcz meatllic wires transmit and good Conductor ok electricity ....

(hope it helps you)

Answer 2

Answer:

All metals have some amount of resistivity to electrical currents, which is why they require a power source to push the current through. The lower the level of resistivity, the more electrical conductivity a metal has. Copper has low resistivity, and therefore is an excellent conductor.