This code find maximum or largest element present in an array. It also prints the location or index at which maximum element occurs in array. This can also be done by using pointers (see both codes).
Wires are made of metal (almost always copper or aluminum, for electrical wires) because those are the best conductors. The internal components of switches are also made of metal, for the same reason. The outside parts, that you touch and see, are...
Insulation is made of materials that are poor conductors, such as glass, plastic, or rubber. These materials are used in an attempt to keep an electrical current within safe boundaries. For example, the plastic coating on an electrical wire acts as insulation and is designed to keep the electricity inside the wire.