VOLT. A unit of electric Prefigure or current-driving electric force, theoretically derived, by, electromagnetic principles. from the centimeter-grammar. second system of units. Practically, the international volt is a certain fraction of the electromotive force of a standard type of voltaic cell at a standard temperature. VOLTMETER.— An electrical measuring instrument for de termining the value of the electromotive force connected to its terminals. A voltage measurer.
Warr.— A unit of power, activity, or rate of vrorking, equal to 1-746th of a horse power, or to 44.4 foot-poimds peT minute. The power expended by a current of one ampere under a pre-ssure of one volt. The power expended by an E.M.F. of one volt through a resistance of one ohm. The power expended by one ampere through a resistance of one ohm. Theoretically derived from the centimeter gmmaur-second electromagnetic system of units.
Warr Houle.— A unit of work, much used in electrical measurements, equal to the work done in one hour at an activity of one watt; approximately 2,700 foot-pounds; exactly 3,600 jodes. The work done by one ampere
under one volt pressure, in an hour. .
An instrument connected to an electric circuit and measuring the power delivered to the circuit in watts.
Wilsarsrom Samcs.— An instrument devised by Sir Charles Wheatstone for measuring electric resistance. by effecting a balance between the resistance to be measured and an adjustable known resistance. The balance employs a bridge or bridging conductor, usually contaMing a galvaniscope.
Wnistsss Tstruntapav.—Generally, any method of signaling which does not employ wires. Specifically, the method of signaling which employs invisible electromsignetic waves radiated from a sending station and detected at the receiving station. See TELEGRAPHY, WIRELESS.
For definitions of mechanical terms see the articles in this encyclopedia on MECHANICAL TERMS; BOILER SHOP TERMS; FOUNDRY AND FORGE SHOP TERMS; ENGINE; ENGINEERING AND STRUCTURAL TERMS; TOOLS; VALVE AND VALVE TERMS ; WORKSHOP TERMS ; and LOCOMOTIVE, PRINCIPAL PARTS OF.