An MRI (or magnetic resonance imaging) scan is a radiology technique that uses magnetism, radio waves, and a computer to produce images of body structures. The MRI scanner is a tube surrounded by a giant circular magnet. The patient is placed on a moveable bed that is inserted into the magnet.
electrical switch. Thesaurus. Definitions of electrical switch. 1. n control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit. switch for reversing the direction of an electric current. a switch that interrupts an electric circuit in the event of an overload.
Network switches, functions & role in networks. 1  1. 2  Network Switches: Functions & Role in NetworksA network switch or switching hub is a computer networking device that connectsmultiple computers together within one local area network (LAN).