Nyaya inotaura nezvemagetsi yakakurukura nezvekuwanda kwemagetsi, uye simba remagetsi rakatsanangurwawo munyaya inotaura nezvemagetsi. Simba remagetsi nesimba remagetsi zviripo muconductor kana paine musiyano uripo pakati peconductor; zvakasiyana, kana pasina musiyano uripo, hapana simba remagetsi kana simba remagetsi zviripo.
Mumuchina wesimbi, munda wemagetsi unoenderana zvakananga nehuwandu hwemagetsi, uko chiyero chemunda wemagetsi nehuwandu hwemagetsi chiri chisingachinji. Chiyero chemunda wemagetsi nehuwandu hwemagetsi chinonzi resistivity kana kuti specific resistance . Panyaya yemasvomhu, hukama huripo pakati pemunda wemagetsi, huwandu hwemagetsi, uye kuramba kwakanangana kunoratidzwa muequation:
Tsananguro: ρ = kuramba kwakananga, E = munda wemagetsi, J = kuwanda kwezvino
Imwe yemafomura emagetsi emagetsi ndeiyi E = V/s apo V = musiyano wesimba remagetsi = voltage yemagetsi uye s = daro, saka unit yesimba remagetsi iVolt/meter (V/m). Fomura yehuwandu hwemagetsi iripo J = I/A apo I = magetsi emagetsi uye A = nzvimbo yechikamu chemubati, saka unit yehuwandu hwemagetsi iripo Ampere/meter yakaenzana (A/m 2 ). Fomura yekudzivirira ndeye ρ = E/J saka unit yekudzivirira ndeye V/m : A/m 2 = V/mxm 2 /A = V/A (m) = Ω m (verenga: Ohm meter). Ω = Volt/Ampere iyuniti yekudzivirira magetsi, maererano neyuniti iyi inotsanangurwa munyaya nezvemutemo weOhm.
Makoshero ekudzivirira akakwirira zvikuru anowanikwa nema insulators emagetsi kana ma conductors emagetsi asina kunaka, nepo makoshero ekudzivirira akaderera anowanikwa nema conductors emagetsi kana ma conductors emagetsi akanaka. Kana conductor ikafambisa magetsi zviri nani, kudzvinyirira kwayo kunoderedza. Kurongeka kwema conductors esimbi ane resistivity yepamusoro kusvika pasi itini, simbi, aruminiyamu, goridhe, mhangura, sirivha. Saka zvinogona kugumiswa kuti kukosha kwekudzivirira kwechinhu kunoratidza chiyero chekugona kwechinhu kudzivirira magetsi.
Kondakita akanaka anoteerera mutemo weOhm, patembiricha yakati, kukosha kwayo kwekudzivirira hakuenderane nesimba remagetsi, zvichireva kuti kana hukuru hwesimba remagetsi hukachinja, kukosha kwekudzivirira hakuchinji. Kusiyana neizvi, kondakita asingateereri mutemo weOhm, kukosha kwayo kwekudzivirira kunoenderana nesimba remagetsi, zvichireva kuti kana hukuru hwesimba remagetsi hukachinja, kukosha kwekudzivirira kunochinjawo.
Kuramba kwesimbi kunoenderana nekupisa. Sezvo tembiricha ichiwedzera, kuramba kunowedzera; zvakasiyana, sezvo tembiricha ichiderera, kuramba kunowedzera. Sezvo tembiricha ichiwedzera, maatomu anofamba nekukurumidza uye anowedzera kusagadzikana, zvichikanganisa kufamba kwemaerekitironi, zvichideredza kufamba kwawo. Sezvo tembiricha ichiderera, maatomu anofamba zvishoma nezvishoma uye akarongeka, zvichiita kuti maerekitironi afambe zvakanaka.
Chinopesana ne resistivity i conductivity. Pamasvomhu, hukama huripo pakati pe resistivity ne conductivity hunoratidzwa ne equation:
σ = 1/ρ
Tsananguro: σ = kufambisa kwemuchina, ρ = kudzivirira kwemuchina.
Chikamu chekudzivirira simba (resistivity) iΩm saka chikamu chekufambisa simba (conductivity) i1/Ωm = (Ωm)-1
Makomputa emagetsi kana maconductor akanaka emagetsi ane maconductor akakwirira, nepo maconductor akaderera ari emagetsi anochengetedza magetsi kana maconductor asina kunaka. Kana conductor ikafambisa magetsi zviri nani, conductor yacho inowedzera. Kurongeka kwemaconductor esimbi ane conductivity yepamusoro kusvika pasi ndeyesirivha, mhangura, goridhe, aruminiyamu, simbi, tin. Saka zvinogona kugumiswa kuti conductivity yechinhu inoratidza chiyero chekugona kwechinhu kuitisa magetsi. Sirivha ine conductivity yakakwira asi inodhura saka mhangura inoshandiswa zvakanyanya se conductor yemagetsi.
