Look at the electric wires in the figure below.
They are made of copper and coated with plastic. Copper is very good ______, and plastic is a very good _______. When more than one material is available for electric current to flow through, the current always travels through the material with the least resistance. That’s why all the current passes through the copper wire and none flows through its plastic coating.
Closeup of copper wires
a
conductor, insulator
b
insulator, conductor
c
blocker of electron flow, proton conduit
d
resistor, pickles
1 answer
a conductor, insulator
1 answer