Final answer:
Grounding is the process of connecting two or more metallic objects with a conductor to the Earth to stabilize voltage levels and protect against electric shock, commonly using copper due to its high conductivity.
Step-by-step explanation:
The process of connecting two or more metallic objects together using a conductor is often referred to as grounding or earthing. This involves fixing a conductor at zero volts by connecting it to the Earth with another good conductor. Grounding is an essential safety feature in electrical systems as it helps to protect users from electric shock and stabilizes voltage levels. Copper is one of the most commonly used materials for this purpose due to its high electrical conductivity, with silver being even more conductive but less commonly used due to high costs.
When electronic devices such as a computer jack, plug, or any other device are connected to wires, particularly those made of copper, they are able to receive electric power. The electricity is conducted through the wires, which are typically shielded by rubber and plastic to act as insulators, preventing the charge from escaping outward.