Mgbe ị na-eji nrụnye ihe mmetụta okpomọkụ kọntaktị, mkpuchi ígwè kwesịrị ịdị nso n'elu nrụnye nke ngwa a na-achịkwa.
Àgwà ndị na-arụ ọrụ: Nchekwa okpomọkụ bụ akụkụ nke na-enye nchebe a pụrụ ịdabere na ya nke ukwuu n'okpuru ọnọdụ okpomọkụ.
Ịgba bọọlụ bụ ụdị ịgbagharị agbagharị. A na-etinye bọọlụ ahụ n'etiti mgbanaka nchara n'ime na mgbanaka nchara, nke nwere ike ibu ibu buru ibu.
Ma arụnyere nrụnye ahụ nke ọma na-emetụta izi ezi, ndụ na arụmọrụ. Ya mere, ngalaba nhazi na mgbakọ kwesịrị ịmụ nke ọma nrụnye nrụnye.
Ọ bụrụ na ejiri eriri mkpuchi kpuchie waya ndu nke ahịhịa carbon, a ga-etinye ya n'ihe njide ahịhịa carbon.
A na-eji brushes carbon, nke a na-akpọkwa brushes eletrik, n'ọtụtụ ngwa eletrik dị ka kọntaktị na-amị amị.