watt balance

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watt balance [′wät ‚bal·əns]

(physics)

A device for making a highly accurate comparison of electrical and mechanical powers, in which the force on a current-carrying coil in a constant magnetic field is balanced by the gravitational force on an accurately measured mass, and then, with the current source removed, the coil is moved at constant speed in the same magnetic field and the induced potential difference is measured.

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No references found			The National Institute of Standards and Technology (NIST) watt balance experiment completed a determination of Planck constant in 1998 with a relative standard uncertainty of 87 X [10. Details of the 1998 watt balance experiment determining the Planck ... by Williams, Edwin / Journal of Research of the National Institute of Standards and Technology The first, called the moving coil watt balance method, relates electrical energy to mechanical power at the quantum level. Bearing down on the kilogram standard by Cowen, Ron / Science News The NIST watt balance experiment is being completely rebuilt after its 1998 determination of the Planck constant. Hysteresis and Related Error Mechanisms in the NIST Watt Balance ... by Woodford, John / Journal of Research of the National Institute of Standards and Technology			Watson, Doc Watson, Dr. John H. Watson, Elkanah Watson, George Neville Watson, James D Watson, James D. Watson, James Dewey Watson, James Eli Watson, John B Watson, John B. Watson, John Broadus Watson, John Christian Watson, Sir William Watson, Thomas Watson, Thomas Edward Watson, Thomas J, Sr. Watson, Thomas John Watson, Thomas John, Jr. Watson, Thomas, Jr. Watson, Tom Watson-Sommerfeld transformation Watson-Watt Watson-Watt, Sir Robert Alexander Watsonville watt watt balance watt current Watt's curve Watt's Dyke Watt's law Watt, James watt-hour watt-hour capacity watt-hour meter watt-second wattage wattage rating Watteau Watteau, Antoine Watteau, Jean-Antoine Wattenbach, Wilhelm Wattenscheid Watters Smith Memorial State Park Watterson, Bill Watterson, Henry wattevilleite wattle wattle gum wattle-and-daub wattlebird wattless component			Watson-Watt Watson-Watt Robert Alexander Watson-Watt, Sir Robert Alexander Watson-Watt, Sir Robert Alexander Watsonia Meriana Watsonia United Little Athletics Club Watsonian vice-counties Watsonius watsoni Watsons Watsons Watsons Watsonville Watsonville Watsonville Community Advisory Committee Watsonville Community Band Watsonville High School Watsonville Union High School Watsonville, California Watsonville, California Watt Watt Watt Watt Watt WATT (AM) WATT (AM) WATT (AM) Watt (unit) Watt (unit) Watt (unit) watt balance watt current Watt curve Watt electrical Watt electrical Watt electrical Watt energy Watt energy Watt energy Watt governor Watt hour Watt hour Watt hour Watt Hours Per Kilogram Watt meter Watt meter Watt meter Watt Peak Watt per Meter Squared Watt per meter-kelvin Watt per meter-kelvin Watt per metre-kelvin Watt per metre-kelvin watt per square centimeter watt per square centimeter watt per square centimeter watt per square centimeter Watt Pulse Communication watt second Watt's curve Watt's Dyke

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