Mu nkhani yokhudza magetsi zakambidwanso pamsonkhano wamagetsi, munda wamagetsi Nkhaniyi yafotokozedwa m'nkhaniyi yokhudza minda yamagetsi. Minda yamagetsi ndi mafunde amagetsi zimakhala mu kondakitala ngati pali kusiyana komwe kungatheke pa kondakitala, mosiyana, ngati palibe kusiyana komwe kulipo ndiye kuti palibe mphamvu yamagetsi ndi mphamvu yamagetsi.
Mu kondakitala wachitsulo, mphamvu yamagetsi imagwirizana mwachindunji ndi mphamvu yamagetsi, komwe chiŵerengero cha mphamvu yamagetsi ndi mphamvu yamagetsi chimakhala chosasintha. Chiŵerengero cha mphamvu yamagetsi ndi mphamvu yamagetsi chimatchedwa mtundu wa kukana kapena kukanaMwa masamu, ubale pakati pa mphamvu yamagetsi, kuchuluka kwa mphamvu yamagetsi ndi kukana kwa magetsi ukufotokozedwa mu equation iyi:
Kufotokozera: ρ = kukana kwapadera, E = mphamvu yamagetsi, J = kuchuluka kwa magetsi
Chimodzi mwa ma formula amagetsi ndi E = V/s pomwe V = kusiyana kwa mphamvu zamagetsi = magetsi ndi s = mtunda, kotero gawo la mphamvu zamagetsi ndi Volt/mita (V/m). Fomula ya kachulukidwe ka magetsi ndi J = I/A pomwe I = mphamvu zamagetsi ndi A = dera lodutsa la kondakitala, kotero gawo la kachulukidwe ka magetsi ndi Ampere/mita sikweya (A/m).2Fomula kukana ndi ρ = E/J kotero gawo la kukana kwapadera ndi V/m: A/m2 = V/m x m2/A = V/A (m) = Ω m (werengani: mita ya Ohm). Ω = Volt/Ampere ndi gawo lolimbana ndi magetsi, gawoli lafotokozedwa m'nkhani yokhudza Lamulo la Ohm.
Chogoli kukana mtengo waukulu kwambiri ndi wa ma insulators amagetsi kapena ma conductors amagetsi osauka, pomwe mtengo wake kukana Kakang'ono kwambiri kamakhala ka kondakitala wabwino wamagetsi kapena kondakitala wamagetsi. Kakondakitala akamayenda bwino, kamakhala kakang'ono kwambiri. kukana dongosolo la ma conductor achitsulo omwe ali ndi kukana Kuyambira zazikulu mpaka zazing'ono kwambiri ndi tini, chitsulo, aluminiyamu, golide, mkuwa, siliva. Chifukwa chake tinganene kuti mtengo wake kukana chinthu chimasonyeza kukula kwa mphamvu ya chinthucho yoletsa mphamvu yamagetsi.
Kondakitala wabwino amene amatsatira lamulo la Ohm, pa kutentha kwina, mphamvu yake yolimbana ndi magetsi siimasiyana ndi mphamvu yamagetsi, zomwe zikutanthauza kuti ngati mphamvu yamagetsi isintha, mphamvu yamagetsi siisintha. Mosiyana ndi zimenezi, kondakitala amene satsatira lamulo la Ohm, mphamvu yake yolimbana ndi magetsi imadalira mphamvu yamagetsi, zomwe zikutanthauza kuti ngati mphamvu yamagetsi isintha, mphamvu yamagetsi imasinthanso.
Kukana kwa chitsulo kumadalira kutentha. Pamene kutentha kukukwera, kukana kumawonjezeka; mosiyana, pamene kutentha kukuchepa, kukana kumachepa. Pamene kutentha kukukwera, maatomu amayenda mofulumira ndipo amasokonezeka kwambiri, zomwe zimalepheretsa kuyenda kwa ma elekitironi, zomwe zimachepetsa kuyenda kwawo. Pamene kutentha kukuchepa, maatomu amayenda pang'onopang'ono ndipo amakhala okonzedwa bwino, zomwe zimapangitsa kuti ma elekitironi aziyenda bwino.
Chotsutsana ndi resistivity ndi conductivity. Mwa masamu, ubale pakati pa resistivity ndi conductivity umafotokozedwa ndi equation:
σ = 1/ρ
Kufotokozera: σ = conductivity ya kondakitala, ρ = resistivity ya kondakitala.
Chigawo cha resistivity ndi Ωm kotero gawo la conductivity ndi 1/Ωm = (Ωm)-1
Ma conductivity apamwamba kwambiri amakhala ndi ma conductor amagetsi kapena ma conductor abwino amagetsi pomwe ma conductivity otsika kwambiri amakhala ndi ma insulators amagetsi kapena ma conductor amagetsi osauka. Conductor ikayendetsa bwino magetsi, conductivity yake imakulanso. Dongosolo la ma conductor achitsulo omwe ali ndi conductivity yapamwamba kwambiri mpaka yotsika kwambiri ndi siliva, mkuwa, golide, aluminiyamu, chitsulo, tini. Chifukwa chake zitha kuganiziridwa kuti conductivity ya chinthu imasonyeza muyeso wa kuthekera kwa chinthucho kuyendetsa magetsi. Siliva ili ndi conductivity yayikulu koma ndi yokwera mtengo kotero mkuwa umagwiritsidwa ntchito kwambiri ngati conductor ya magetsi.
