An electric current must flow in a complete path. The current begins at the source, through the wires, and back to the source. D. Electric current flows through certain materials called conductors. Electric current flows through some materials better than other materials. A. Conductors are materials that electric current flows through.
Some metals are conductors.
Tin and lead are poor conductors because they have less than one electron per atom. Therefore, poor conductors create resistance causing the electrical energy to become heat. B. Materials that do not let electricity flow through them are called insulators. Most conductors are insulated with material that does not allow electricity to flow through it. Rubber and plastic are insulators used to cover wires so electricity does not leak out.