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词汇 Current balance
分类 英语词汇 英语翻译词典
释义

Current balance

原声例句
VOA Special 2021年7月合集

" But, in Haiti, nothing can be taken for granted. It depends how the current balance of forces in Haiti plays out, " Dupuy said.

他表示，" 但在海地，任何事都不能被视为理所当然。这取决于海地目前的力量平衡情况。"

英语百科

Ampere balance

（重定向自Current balance）
(left) Rosa-Dorsey type Ampere balance at the US National Bureau of Standards (now NIST) in 1927. The current coils are visible under the balance, attached to the right balance arm. (right) Ampere balance constructed at the former National Institute of Advanced Industrial Science and Technology, Japan, now in the National Museum of Nature and Science, Tokyo, Japan.
The ampere balance
Slider of Kelvin's 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 attached to one arm of a sensitive balance. The magnetic force between the two coils is measured by the amount of weight needed on the other arm of the balance to keep it in equilibrium. This is used to calculate the magnitude of the current.
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