Lamulo loyamba la Kirchhoff lotchedwanso lamulo la malo olumikizirana limati mphamvu yamagetsi yomwe imalowa pamalo olumikizirana ndi yofanana ndi mphamvu yamagetsi yomwe imatuluka pamalo olumikizirana. Malo olumikizirana mu dera lamagetsi ndi malo omwe ma conductor awiri kapena angapo amakumana, monga mfundo a yomwe ili pachithunzi chomwe chili pambali.
Ine ndi mphamvu yamagetsi yomwe imalowa pamalo olumikizirana, pomwe Ine 1 ndi Ine 2 ndi mphamvu yamagetsi yomwe imatuluka pamalo olumikizirana, Ine = Ine 1 + Ine 2. Chitsanzo china, onani chithunzi chomwe chili pansipa.
Ine ndine wobwera magetsi, pamene ine1, I2, ndipo ine3 ndi mafunde amagetsi otuluka, I = I1 + I2 + I3.
Lamulo loyamba la Kirchhoff limachokera ku lamulo losunga mphamvu zamagetsi lomwe limati mphamvu zamagetsi ndi zamuyaya, mphamvu zamagetsi zomwe zikubwera ziyenera kukhala zofanana ndi mphamvu zamagetsi zomwe zimatuluka, palibe mphamvu zamagetsi zomwe zimatayika. Mphamvu zamagetsi ndi mphamvu zamagetsi zomwe zimayenda mkati mwa nthawi inayake. Mphamvu zamagetsi zomwe zimalowa pamalo olumikizirana ndi zofanana ndi mphamvu zamagetsi zomwe zimatuluka pamalo olumikizirana.
Lamulo loyamba la Kirchhoff linanenedwa ndi Gustav Kirchhoff (1824-1887), katswiri wa sayansi ya zakuthambo wa ku Germany.
Chitsanzo cha vuto 1:
I 1 = 2 A, I 2 = 3 A, I 3 = 5 A, I 4 = 3 A. Dziwani I 5!
yankho;
Ndimalowa = ndimatuluka
Ine 1 + Ine 3 = Ine 2 + Ine 4 + Ine 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 A
Chitsanzo cha vuto 2:
Ine = 10 A, Ine 1 = 2 A, Ine 2 = 4 A. Dziwani Ine 3!
yankho;
Ndimalowa = ndimatuluka
Ine = Ine 1 + Ine 2 + Ine 3
10 A = 2 A + 4 A + I 3
10 A = 6 A + I 3
I 3 = 10 A – 6 A
I 3 = 4 A
