Isihloko mayelana nomthombo wamandla kagesi i-emf Ukumelana kwangaphakathi I-voltage yetheminali
Amandla kagesi ageleza ku-closed circuit, kusukela ku-high potential kuya ku-low potential. Lapho amandla kagesi ehamba ngengxenye yokumelana nogesi, kuba nokuncipha kwamandla kagesi ngoba amandla kagesi asetshenziswa kulokhu kumelana. Ukuze amandla kagesi aqhubeke nokugeleza kusukela ku-high potential kuya ku-low potential,
kumele kube nedivayisi yokwengeza amandla kagesi angase abe khona, ithuluzi lingamandla kagesi (emf) noma elibizwa ngokunembile ngokuthi umthombo wamandla kagesi. I-Emf noma umthombo wamandla kagesi yingxenye eguqula uhlobo lwamandla lube amandla kagesi, njengamabhethri, amaseli elanga, noma amajeneretha kagesi.
Umthombo wamandla kagesi (emf)
Isithombe esiseceleni siwumfanekiso olula wesekethe evaliwe ene-emf (ε) kanye nokumelana (R). Imigqa emide eqondile emthonjeni we-emf imelela amandla aphezulu, kuyilapho imigqa emifushane eqondile imelela amandla aphansi. Amashaja kagesi asuka emandleni aphezulu aye emandleni aphansi. Ishaja kagesi ehamba phakathi nesikhathi esithile ibizwa ngokuthi ugesi, lapho isiqondiso sogesi siboniswa khona ngomcibisholo.
Uma inamandla amakhulu, ishaja inamandla kagesi. Amandla kagesi ayancipha lapho ishaja kagesi idlula i-resistor. Uma ishaja kagesi ingena emthonjeni we-emf isuka kumandla aphansi iye kumandla aphezulu, amandla kagesi ayanda.
Ukumelana kwangaphakathi
Uma ishaja kagesi ingena ngaphakathi komthombo we-emf, amashaja abhekana nokumelana. Umthombo wangempela kagesi empilweni uvame ukuba nokumelana kwangaphakathi, okuvezwa uphawu r. Uma ishaja kagesi igeleza ngokumelana kwangaphakathi (r), amandla kagesi ayancipha.
I-voltage yesiphetho
I-voltage ye-terminal (V) yi-voltage ehlanzekile ekhiqizwa umthombo we-voltage kagesi noma umthombo we-emf. Ngokwezibalo, ivezwa ngezibalo:
V = ε – I r
V = I-voltage ye-terminal, ε = emf, I = ugesi wamanje, r = ukumelana kwangaphakathi.
Uma ibhethri le-12 Volt linokumelana okungu-0.2 Ω khona-ke uma i-2 A iphuma ebhethrini, i-voltage yokugcina ingu-12 – (0.2) (2) = 12 – 0.4 = 11.6 Volt.
Uma kungekho ugesi ogeleza usuka ebhethrini, inani le-voltage yokugcina = i-emf. Ake sithi i-emf = ama-volt angu-12, khona-ke i-voltage yokugcina = ama-volt angu-12. Uma kukhona ugesi ogeleza usuka emthonjeni we-emf, i-voltage yokugcina incane kune-emf.
I-Emf yi-voltage kagesi ebhalwe isibonelo ebhethrini, kuyilapho i-voltage yokugcina iyi-voltage kagesi yangempela noma umehluko wangempela wamandla, lapho inani lithintwa khona ugesi ogeleza ebhethrini.
