Planck constant Current Affairs, GK & News
International Bureau of Weights and Measures (BIPM) had decided that the kilogram will no longer be pegged to this cylinder made of 90% platinum and 10% iridium. Background In the last 60 years, several standard units — the second, metre, ampere, Kelvin, mole, candela and, the kilogram — have all ceased to be defined by ..
Topics: Force • International System of Units • Kibble balance • Kilogram • Law by country • Mass • Measurement • Measuring instruments • Metrology • Planck constant • Politics by country • Units of mass
The International Conference of heads of Metrology Institutes held in Sevres, France has decided that the measure of kilogram will no longer be pegged to cylinder. From 2019 onwards, it will be set by value of Planck constant in combination with definitions of meter and second. Why it was changed? Till now, the kilogram is ..