Ka hoʻohālikelike o ke kū'ē uila
Ma ke kumuhana o ke kānāwai o Ohm, ua loaʻa kahi haʻilula e hōʻike ana i ka pilina ma waena o ke ana uila (V), ke au uila (I), a me ke kū'ē uila (R). Ua hōʻike ʻia ma ka makemakika ma o nā kaulike:
Hōʻike kēia kaulike ua kūlike pololei ke kū'ē uila (R) me ke ana uila (V) a kūlike hoʻi me ke au uila (I). Inā ʻoi aku ka nui o ke ana uila ma mua o ke kū'ē uila, e nui ana ka nui, ma ke ʻano ʻē, inā ʻoi aku ka ikaika o ke au uila, e nui ana ke kū'ē uila. Wehewehe kēia kaulike i ke kānāwai o Ohm ke paʻa mau ke kū'ē uila (R). Inā ʻaʻole paʻa ke kū'ē uila, a laila ʻaʻole wehewehe kēia kaulike i ke kānāwai o Ohm, akā, wehewehe i ke kū'ē o kahi alakaʻi.
Ma ka ʻatikala e pili ana i ke kānāwai o Ohm, ua wehewehe ʻia ka pilina ma waena o ke kū'ē ʻana o ke alakaʻi uila (R), ke kū'ē ʻano a i ʻole ke kū'ē ʻana o ke alakaʻi (ρ), ka lōʻihi o ke alakaʻi (l), a me ka ʻāpana ʻāpana o ke alakaʻi (A). Ua hōʻike ʻia ma ka makemakika ma ka hoohalike:
Ma muli o kēia kaulike, ua hoʻoholo ʻia he kūlike pololei ke kū'ē uila i ke kū'ē o ke ʻano a me ka lōʻihi o ke alakaʻi, akā ua kūlike ʻole ia i ka ʻāpana ʻāpana o ke alakaʻi. I nā huaʻōlelo ʻē aʻe, piʻi ka kū'ē uila i ka wā e piʻi ai ke kū'ē o ke ʻano a me ka lōʻihi o ke alakaʻi, ʻoiai e emi ana ke kū'ē uila inā piʻi ka ʻāpana ʻāpana o ke alakaʻi.
Inā paʻa ka lōʻihi o ke alakaʻi (l) a me ka ʻāpana ʻāpana (A), pili wale ke kū'ē uila (R) i ke ʻano kū'ē (ρ). Inā piʻi ke ʻano o ke kū'ē, piʻi ke kū'ē uila, a i ka ʻaoʻao ʻē aʻe, inā e hoʻemi ʻia ke ʻano o ke kū'ē a laila e emi ana ke kū'ē uila. Pili pono ka waiwai kū'ē o kēlā me kēia ʻano alakaʻi i ka mahana,
Inā piʻi ke kiʻekiʻe o ka mahana ma mua o ke ʻano o ke kū'ē, e nui aʻe ana a i ʻole ka ʻaoʻao ʻē aʻe, inā haʻahaʻa ke mahana ma mua o ke ʻano e liʻiliʻi ana ke kū'ē o ke ʻano.
ʻO ke ʻano kū'ē o ke kū'ē (resistivity) ʻo ia ka conductivity. He kūlike ʻole ka conductivity i ka resistivity, e like me ka mea i ʻōlelo ʻia ma ka hoohalike ma lalo nei:
Inā hōʻike ʻia ma ke conductivity, loli ka hoohalike 2 i:
Ma muli o kēia kaulike, hiki ke hoʻoholo ʻia he kūlike ʻole ke kū'ē uila i ka conductivity,
inā ʻoi aku ka conductivity o ke alakaʻi ma mua o ka liʻiliʻi o ke kūʻē uila a i ʻole ka ʻaoʻao ʻē aʻe, inā liʻiliʻi ka conductivity o ke alakaʻi ma mua o ka nui o ke kūʻē uila.
Ua hōʻike ʻia ka waiwai kū'ē o kēlā me kēia ʻano mea ma ka papa ma lalo nei.
Anakahi o ke kū'ē
ʻO Volt ke anakahi o ka uila, ʻo Ampere ke anakahi o ke au uila no laila ʻo Volt / Ampere ke anakahi o ke kū'ē uila. Ua kapa ʻia ʻo Volt / Ampere ʻo Ohm i hōʻailona ʻia e Ω, e mahalo ana iā Georg Simon Ohm (1789-1854), he kanaka loea kino Kelemania. Ma waho aʻe o Ohm, hoʻohana ʻia hoʻi nā anakahi kilo-ohm a me megaohm. 1 kilo-ohm (kΩ) = 1000 Ω = 10 3 Ω, ʻoiai ʻo 1 mega-ohm (MΩ) = 1000,000 Ω = 10 6 Ω.
Nā mea ana o ke kū'ē
ʻO ka mea ana o ke kū'ē uila he ohmmeter. Ua hoʻohui ʻia kēia mea ana i loko o kahi multimeter, kahi mea no ke ana ʻana i ka uila uila, ke au uila, a me ke kū'ē uila.
