ʻO ke kānāwai mua o Kirchhoff, i ʻike ʻia hoʻi ʻo ke kānāwai kiko lālā, ʻōlelo ʻo ia he like ke au uila e komo ana i kahi kiko lālā me ke au uila e haʻalele ana i kēlā kiko lālā. ʻO kahi kiko lālā i loko o kahi kaapuni uila kahi kiko kahi e hui ai ʻelua a ʻoi aku paha nā alakaʻi. e like me ke kiko a ma ke kiʻi ma ka ʻaoʻao.
ʻO I ke au uila e komo ana i ke kiko lālā, ʻoiai ʻo I 1 a me I 2 nā au uila e haʻalele ana i ke kiko lālā, I = I 1 + I 2. ʻO kekahi laʻana, e nānā i ke kiʻi ma lalo.
ʻO I ke au uila e komo mai ana, ʻoiai ʻo I1, I2 a ʻo wau3 ʻo ia ke au uila e puka mai ana, I = I1 + ʻO wau2 + ʻO wau3.
Hoʻokumu ʻia ke Kānāwai Mua o Kirchhoff ma ke kānāwai o ka mālama ʻana i ka uila, kahi e ʻōlelo nei ua mālama ʻia ka uila, no laila e like ka uila e komo mai ana me ka uila e puka ana; ʻaʻohe uila e nalowale. ʻO ke au uila ka uila e kahe ana ma luna o kekahi manawa. No ka mea ua mālama ʻia ka uila, ʻo ke au uila e komo ana i kahi lālā ua like ia me ke au uila e haʻalele ana i kēlā lālā.
Ua hoʻokumu ʻia ke kānāwai mua o Kirchhoff e Gustav Kirchhoff (1824-1887), he loea lapaʻau Kelemania.
Laʻana nīnau 1:
I1 = 2 Amperes, I2 = 3 Amperes, I3 = 5 Amperes, I4 = 3 Amperes. E hoʻoholo i ka I5!
Pahana
I loko = I waho
ʻO 1 + ʻO 3 = ʻO 2 + ʻO 4 + ʻO 5
2 A + 5 A = 3 A + 3 A + I 5
7 A = 6 A + I 5
ʻO 5 = 7 A – 6 A
ʻI 5 = 1 Ampere
Laʻana nīnau 2:
ʻO I = 10 Amperes, ʻO I1 = 2 Amperes, I2 = 4 Amperes. E hoʻoholo i ka I3!
Pahana
I loko = I waho
ʻO wau = ʻO wau 1 + ʻO wau 2 + ʻO wau 3
10 A = 2 A + 4 A + I 3
10 A = 6 A + I 3
ʻO 3 = 10 A – 6 A
ʻI 3 = 4 Amperes
