Umthetho Wokuqala KaKirchhoff

Umthetho wokuqala kaKirchhoff, owaziwa nangokuthi umthetho we-branch point, uthi ugesi ongena endaweni yegatsha ufana nogesi ophuma kuleyo ndawo yegatsha. Indawo yegatsha esesekethe kagesi yindawo lapho kuhlangana khona omqhubi ababili noma ngaphezulu. njengephuzu u-a esithombeni ohlangothini.

Mina ngingugesi ongena endaweni yegatsha, kuyilapho mina ₁ kanye no-I ₂ kuyimisinga kagesi eshiya indawo yegatsha, mina = I ₁ + I _2. Esinye isibonelo, bheka isithombe esingezansi.

Ngingugesi ongenayo, kuyilapho mina₁, Mina₂ nami₃ ugesi ophumayo, mina = mina₁ + Mina₂ + Mina₃.

UMthetho Wokuqala kaKirchhoff usekelwe emthethweni wokulondolozwa kweshaja kagesi, othi ishaja igcinwa, ukuze ishaja kagesi engenayo ilingane neshaja kagesi ephumayo; akukho shaja kagesi elahlekayo. Amandla kagesi yishaja kagesi egeleza phakathi nesikhathi esithile. Ngenxa yokuthi ishaja kagesi igcinwa, amandla kagesi angena endaweni yegatsha afana nalamandla kagesi aphuma kuleyo ndawo yegatsha.

Umthetho wokuqala kaKirchhoff wabekwa phambili nguGustav Kirchhoff (1824-1887), isazi sefiziksi saseJalimane.

Isibonelo sombuzo 1:

I₁ = Ama-Ampere ama-2, i-I₂ = Ama-Ampere ama-3, i-I₃ = Ama-Ampere ama-5, i-I₄ = 3 Ama-Ampere. Thola i-I₅!

Ingxoxo

Ngingena = ngiphumile

Mina ₁ + Mina ₃ = Mina ₂ + Mina ₄ + Mina ₅

2 A + 5 A = 3 A + 3 A + I ₅

7 A = 6 A + I ₅

I ₅ = 7 A – 6 A

I ₅ = 1 Ampere

Isibonelo sombuzo 2:

I = 10 Amperes, I₁ = Ama-Ampere ama-2, i-I₂ = 4 Ama-Ampere. Thola i-I₃!

Ingxoxo

Ngingena = ngiphumile

Mina = Mina ₁ + Mina ₂ + Mina ₃

10 A = 2 A + 4 A + I ₃

10 A = 6 A + I ₃

I ₃ = 10 A – 6 A

I ₃ = 4 Ampere