North Africa, region of Africa comprising the modern countries of Morocco, Algeria, Tunisia, and Libya. North AfricaEncyclopÃ¦dia Britannica, Inc.The geographic entity North Africa has no single accepted definition.
A Stressor is anything (physical or psychological) that produces stress (negative or positive) is considered a stressor.
When a relay is used to switch a large amount of electrical power through its circuits, it is given a new name, a Contactor. These contactors are very commonly used in industries for control of electric motors. Thus it is clear that contactor is only a special type of relay.y olivia Last updated on: February 28, 2011. Contactor vs Relay. Contactor and relay are two terms often encountered when dealing with electric circuits. Both these devices are used for similar purposes and hence people are often confused about the difference between a contactor and a relay.