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The ampere balance. The ampere balance (also current balance or Kelvin balance) is an electromechanical apparatus used for the precise measurement of the SI unit of electric current, the ampere. It was invented by William Thomson, 1st Baron Kelvin . The current to be measured is passed in series through two coils of wire, one of which is ...
The current coils are visible under the balance, attached to the right balance arm. The Kibble balance is a development of the Ampere balance. The Kibble balance is a more accurate version of the ampere balance , an early current measuring instrument in which the force between two current-carrying coils of wire is measured and then used to ...
An analytical balance (or chemical balance) is a class of balance designed to measure small mass in the sub-milligram range. The measuring pan of an analytical balance (0.1 mg resolution or better) is inside a transparent enclosure with doors so that dust does not collect and so any air currents in the room do not affect the balance's operation ...
Abingdon School, Jesus College, Oxford. Occupation. Physicist. Employer. National Physical Laboratory. Bryan Peter Kibble (20 October 1938 – 28 April 2016) was a British physicist and a pioneering metrologist. He was the inventor of the Kibble balance, an improved version of the current balance, developed for the realisation of the S.I. unit ...
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Electrophysiology (from Greek ἥλεκτ, ēlektron, "amber" [see the etymology of "electron" ]; φύσις, physis, "nature, origin"; and -λογία, -logia) is the branch of physiology that studies the electrical properties of biological cells and tissues. It involves measurements of voltage changes or electric current or manipulations on a ...
Beams - The three beams on the balance are used to set the level of precision, with each beam working at different increments (1-10 grams, 10 grams and 100 grams). When using the triple beam balance, it is recommended that one start with the lowest level of precision (e.g 100 gram increments).
The current account is an important indicator of an economy's speed. It is defined as the sum of the balance of trade (goods and services exports minus imports ), net income from abroad, and net current transfers. A positive current account balance indicates the nation is a net lender to the rest of the world, while a negative current account ...