A track and field discipline where runners take turns in carrying a baton from start to finish. Most common events are 4x100 meter and 4x400 meter competitions
An electric switch, when a control voltage is applied to the device, two terminals are connected (or disconnected)
An electromechanical switch that uses a small amount of incoming electricity to charge an electromagnet, which physically pulls down a connecting switch to complete a circuit This allows a low-power circuit to divert the electricity in a high-power circuit
A device having two separate circuits, it is constructed so that a small current in one of the circuits controls a large current in the other circuit A motor starting relay opens or closes the starting circuit under predetermined electrical conditions in the main circuit (run winding)
An electromechanical switch or device in which changes in the current flow in one circuit are used to open or close electrical contacts in a second circuit
Relating to, or having the characteristics of, an auxiliary apparatus put into action by a feeble force but itself capable of exerting greater force, used to control a comparatively powerful machine or appliance
A supply of anything arranged beforehand for affording relief from time to time, or at successive stages; provision for successive relief
An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current
These electronic components control other devices in a circuit A set of contacts, the switching mechanism, open or close when the relays magnetic coil becomes energized Resistance The opposition to current flow through a conductor in a closed circuit
In various forms of telegraphic apparatus, a magnet which receives the circuit current, and is caused by it to bring into into action the power of a local battery for performing the work of making the record; also, a similar device by which the current in one circuit is made to open or close another circuit in which a current is passing
An electromagnetic device that opens or closes the flow of current in a circuit Normally used to reduce the amount of electricity through a switch
A device have two separate circuits, it is constructed so that a small current in one of the circuits controls a large current in the other circuit A motor starting relay opens or closes the starting circuit under predetermined electrical conditions in the main circuit (run winding)
electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit