Mezue ahịrịokwu na-esonụ: N'ịghọta onyinye ya n'ịmepụta sayensị eletriki nke oge a, otu nkwekọrịta mba ụwa, nke a bịanyere aka na ya na 1881
N'otu afọ ahụ, e guzobere amper dị ka otu ọkọlọtọ nke eletrik, tinyere coulomb, volt, ohm, watt na farad, nke a na-akpọ aha, n'otu n'otu, mgbe ndị Ampère oge Charles-Augustin de Coulomb nke France, Alessandro Volta nke Italy, Georg Ohm nke Germany, James Watt nke Scotland na Michael Faraday nke England. Aha Ampère bụ otu n'ime aha iri asaa na abụọ e dere n'elu Ụlọ Elu Eiffel.