Umqondo wamandla kagesi

Ku-electromagnetism, inani likagesi elidlula kunoma iyiphi ingxenye yesiphambano somqhubi ngesikhathi seyunithi libizwa ngokuthi amandla kagesi, noma umane nje ugesi wamandla. Uphawu lwamandla kagesi ngu-I, kanti iyunithi yi-ampere (A), noma umane nje “A” (André-Marie Ampère, 1775-1836, isazi sefiziksi kanye nesazi semithi saseFrance, owenze impumelelo evelele ekufundweni kwemiphumela kagesi futhi wanikela nangezibalo kanye nefiziksi. Iyunithi yamazwe ngamazwe yamandla kagesi, i-ampere, iqanjwe ngesibongo sakhe).
[1] Ukunyakaza okuvamile kokuqondisa kwamahhala kumqhubi ngaphansi kwesenzo samandla kagesi kwakha ugesi.
[2] Kugesi, kunqunywa ukuthi isiqondiso sokugeleza okuqondile kwamashaji amahle sisiqondiso samandla amanje. Ngaphezu kwalokho, kubunjiniyela, isiqondiso sokugeleza okuqondile kwamashaji amahle sisetshenziswa futhi njengesiqondiso samandla amanje. Ubukhulu bamandla amanje buvezwa yishaja Q egeleza engxenyeni ephambene yomqhubi ngesikhathi seyunithi, okubizwa ngokuthi amandla amanje.
[3] Kunezinhlobo eziningi zezithwali ngokwemvelo ezithwala ukushaja kukagesi. Isibonelo: ama-electron ahambayo kuma-conductor, ama-ion kuma-electrolyte, ama-electron nama-ion ku-plasma, kanye nama-quark kuma-hadron. Ukunyakaza kwalezi zithwali kwakha ugesi.