A watt balance is an experimental electromechanical weight measuring instrument that measures the weight of a test object very precisely by the strength of an electric current and a voltage. It is being developed as a metrological instrument that may one day provide a definition of the kilogram unit of mass based on electronic units, a so-called "electronic kilogram". The name watt balance comes from the fact that the weight of the test mass is proportional to the product of the current and the voltage, which is measured in units of watts.
Read more about Watt Balance: Design, Origin, Principle, Measurements
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