Question

which word can logically replace question water is to pipe as is to wire

Answer 1

As water is to pipe then current is to wire.
as water flows from pipe so only one thing commonly flows from wire i.e, Current

Answer 2

As water is to pipe then current is to wire. Current is only one thing commonly flow from the wire.

Electric current basically flow from electric charge. Electric circuit charges is carried through electron in a wire.

Ammeter is the device that measures electric current. When there is a water in a pipe then current can flow in pipe.