Nha nke iguzogide eletriki
N'isiokwu nke iwu Ohm, e nwetala usoro nke na-egosi mmekọrịta dị n'etiti voltaji (V), ọkụ eletrik (I), na iguzogide eletriki (R). E gosipụtara ya na mgbakọ na mwepụ site na nha nhata:
Usoro a na-egosi na nguzogide eletriki (R) dabere kpọmkwem na voltaji eletrik (V) ma dabere na nguzogide eletriki (I). Ọ bụrụ na voltaji isi karịrị nguzogide eletriki na-abawanye, n'ụzọ megidere nke ahụ, ọ bụrụ na ike eletriki na-abawanye karịa nguzogide eletriki ga-adị ukwuu. Usoro a na-akọwa iwu Ohm naanị mgbe nguzogide eletriki (R) na-adịgide adịgide. Ọ bụrụ na nguzogide eletriki anaghị agbanwe agbanwe, mgbe ahụ usoro a anaghị akọwa iwu Ohm, kama ọ na-akọwa nguzogide nke onye na-eduzi.
N'isiokwu gbasara iwu Ohm, akọwara mmekọrịta dị n'etiti nguzogide onye na-eduzi eletriki (R), nguzogide ụdị ma ọ bụ nguzogide onye na-eduzi (ρ), ogologo onye na-eduzi (l), na mpaghara mpaghara nke onye na-eduzi (A). E gosipụtara ya na mgbakọ na mwepụ na nha nhata:
Dabere na nha nha a, a na-ekwu na nguzogide eletriki dabere kpọmkwem na nguzogide nke ụdị na ogologo nke onye na-eduzi ya, mana ọ dabere na mpaghara obe nke onye na-eduzi ya. N'ikwu ya n'ụzọ ọzọ, nguzogide eletriki na-abawanye mgbe nguzogide nke ụdị na ogologo nke onye na-eduzi ya na-abawanye, ebe nguzogide eletriki na-ebelata ma ọ bụrụ na mpaghara obe nke onye na-eduzi ya na-abawanye.
Ọ bụrụ na ogologo onye na-eduzi (l) na mpaghara obe (A) na-agbanwe agbanwe, nguzogide eletriki (R) na-adabere naanị na ụdị nguzogide (ρ). Ọ bụrụ na ụdị nguzogide ahụ na-abawanye, nguzogide eletriki na-abawanye, n'ụzọ megidere nke ahụ, ọ bụrụ na ụdị nguzogide ahụ ebelata, nguzogide eletriki ahụ na-ebelata. Uru nguzogide nke ụdị onye na-eduzi ọ bụla dabara kpọmkwem na okpomọkụ,
ọ bụrụ na okpomọkụ ahụ dị elu karịa ụdị iguzogide ahụ na-abawanye ma ọ bụ megide ya, ọ bụrụ na okpomọkụ ahụ dị ala karịa ka iguzogide ụdị ahụ na-ebelata.
Ụdị nguzogide dị iche (resistvion) bụ conductivity. Conductivity na resistvion bụ ihe na-agbanwe agbanwe, dịka ekwuru na usoro dị n'okpuru:
Ọ bụrụ na e gosipụtara ya na conductivity, usoro nhazi 2 ga-agbanwe gaa na:
Dabere na usoro a, enwere ike ikwubi na nguzogide eletriki bụ nke a na-agbanwe agbanwe na conductivity,
ọ bụrụ na conductivity nke conductor karịrị ike eletriki na-ebelata ma ọ bụ na-ebelata ike eletrik, ọ bụrụ na conductivity nke conductor ahụ dị obere karịa ike eletriki na-ebelata ike eletrik.
A na-egosi uru iguzogide nke ụdị ihe ọ bụla na tebụl dị n'okpuru.
Nkeji na-eguzogide
Ngụkọta ọkụ eletrik bụ Volt, ngụkọta ọkụ eletrik bụ Ampere nke mere na ngụkọta nke iguzogide ọkụ eletrik bụ Volt / Ampere. A na-akpọkwa Volt / Ampere Ohm nke Ω na-anọchi anya ya, na-ekele Georg Simon Ohm (1789-1854), onye German physics. E wezụga Ohm, a na-ejikwa ya kilo-ohm na megaohm units. 1 kilo-ohm (kΩ) = 1000 Ω = 10 3 Ω, ebe 1 mega-ohm (MΩ) = 1000,000 Ω = 10 6 Ω.
Ngwaọrụ nha nke iguzogide
Ngwa nha nke iguzogide eletriki bụ ohmmeter. E tinyela ngwa nha a n'ime multimeter, ngwaọrụ maka ịtụ voltaji eletriki, ọkụ eletrik, na iguzogide eletriki.
