<prompt> Bhala okuqhubekayo kwalesi sigaba - Uhlelo lwe-BA lwamayunithi asebenzayo lwathola ukwesekwa okukhulu kwamazwe omhlaba, futhi lwamukelwa ngokuguqulwa okukodwa okubalulekile yiNgqungquthela Yokuqala Yomhlaba Wonke Yogesi  <response>: Paris, ngo-1881. Inhlangano yaseBrithani yayakhe umfuziselo we-ohm ubude obujwayelekile bocingo lokumelana olwalunokumelana kwamayunithi angu-109 CGS wokumelana kagesi, okungukuthi i-ohm eyodwa kuyilapho ingqungquthela yamazwe ngamazwe yakhetha indlela yokwenziwa eyayingaphindwa emalabhorethri ahlukahlukene emazweni ahlukahlukene. Indlela ekhethiwe yayisekelwe ekumelaneni kwe-mercury, ngokulinganisa ukumelana kwekholomu ye-mercury yobukhulu obucacisiwe 106 cm × 1 mm2: noma kunjalo, ubude bekholomu obukhethiwe babucishe bube ngama-millimeter ama-3 amafushane kakhulu, okuholele ekutheni kube nomehluko ongu-0,28 phakathi kwamayunithi amasha asebenzayo namayunithi e-CGS okwakuthiwa ayisisekelo sawo. 