File:A_moving_coil_galvanometer._Wellcome_M0016397.jpg · Wikimedia Commons · See Wikimedia Commons
A galvanometer is an instrument that detects and measures small electric currents by using a magnet to make a coil rotate, with the amount of rotation indicating the strength of the current. It was an important early tool for studying electricity and became the foundation for modern electrical measuring devices like ammeters and voltmeters.
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Wikidata facts
- Named after
- Luigi Galvani
- Image
- A moving coil galvanometer. Wellcome M0016397.jpg
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- Commons category
- Galvanometers
- topic's main category
- Category:Galvanometers
- name in kana
- けんりゅうけい
- measures
- electric current
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Article · 中文
检流计，又稱電流計(galvanometer)，被用于测量微弱电流。其工作原理為利用電流的磁效應，當電流通過其導線時，會產生磁場，與永久磁鐵互斥而帶動指針旋轉，与磁电式电流表基本相同。檢流計與電流表、電壓計極為相關，電流表的設計原理為檢流計並聯一個低電阻，其測量範圍較檢流計大，但相對上其精確度較檢流計低，且其偏轉方向為電流方向，不同於檢流計偏轉方向為電子流方向。電壓計的設計原理則是檢流計串聯一個高電阻。检流计在移動運送或不使用时，须将两端短路，以增加指針晃動的阻尼，减少对检流计的伤害。 現今廣泛使用的檢流計是達松發（D'Arsonval）／威士頓（Weston）型式的動圈表頭。
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