No electrical device, whether it's a simple flashlight or a complex computer, will work unless the circuit that delivers the electric current is a complete loop.
(it; 's; a simple flashlight or a complex computer) (No electrical device; will work; ) (the circuit; delivers; the electric current) (the circuit that delivers the electric current; is; a complete loop)
it No electrical device the circuit the circuit that delivers the electric current
's will work delivers is
a simple flashlight or a complex computer
the electric current
a complete loop