Explain why copper is commonly used for electrical wires while plastic is used for the coating. Answer Key & Explanations C) Plastic ruler . Metals (iron, copper) and graphite are conductors , while plastic prevents the flow of charge. B) Series; Current
: A device connected in parallel to measure potential difference. Part 2: Circuit Diagrams Series Circuit : Draw a diagram containing one battery, a switch (closed), and two identical bulbs. f2 science electricity exercise