Welcome To Albany, New York. Albany enjoys a vibrant downtown, a rich mixture of historical neighborhoods, and an exciting variety of arts, cultural and entertainment opportunities. Albany serves as the capital of New York State and it has a population of approximately 100,000.
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal.
Top 10 facts about the world. An electrical relay is a switch that is under the control of another circuit. A classic example is the system used to start a car â when someone turns an ignition key, the ignition does not interact directly with the car battery. Instead, it activates a relay, which passes the signal on so that the car can start.