UbuchwephesheElectronics

Amandla we-capacitor nekhono layo

Uma kubhekwa amacala amabili kubanikazi ababili abodwa, okuzobizwa ngokuthi ukuhluka okungafani phakathi kwabo, okuxhomeke ngobukhulu balezi zinkokhelo nakulo geometry labaqhubi. Uma kwenzeka ukuthi amacala akho afana nobukhulu kodwa ahambisane nesibonakaliso, ungangena incazelo yenamandla kagesi, lapho ungathola khona umqondo njengamandla we-capacitor. Amandla kagesi wesistimu ehlanganisa abaqhubi ababili ukulinganisa kwesinye sezinkokhelo kumehluko engenzeka phakathi kwalaba baqhubi.

Amandla we-capacitor ancike ngokuqondile ku-capacitance. Lobuhlobo bungenqunywa ngokubala. Amandla we-condenser (ifomula) azomelelwa ngethunge:

W = (C * U * U) / 2 = (q * q) / (2 * C) = q * U / 2, lapho iW energy yesikhulu, iC capacitance, uU umehluko phakathi kwamapulethi amabili (voltage) , Q yi-value yenani lokukhokha.

Inani lekhwalithi yekhono lixhomeke kubukhulu nobujamo bomqhubi kanye nedielectric ehlukanisa laba baqhubi. Isistimu lapho insimu kagesi igxilile khona (endaweni) kuphela esifundeni esithile ibizwa ngokuthi i-condenser. Abaqhubi abakha le divayisi kuthiwa ama-plates. Lona umklamo olula kunalokho okuthiwa yi- capacitor flat.

Idivaysi elula yizicabha ezimbili zeplati, ezikwazi ukuqhuba amanje kagesi. Idatha yamacwecwe ahambisana nendawo ethile (encane) kusuka komunye nomunye futhi ehlukaniswe ngendwangu yetshezi ethile. Amandla ensimu ye-condenser kuleli cala izokwenziwa ikakhulukazi phakathi kwamapuleti. Kodwa-ke, eduze kwemiphetho yamacwecwe nakwezinye izindawo ezizungezile, namanje imisebe ebuthakathaka izovela. Kubizwa ngokuthi ensimini indawo yokuhlakaza. Ezimweni eziningi, kuvunyelwe ukungayinaki futhi bacabange ukuthi wonke amandla ekhono afakwe ngokuphelele phakathi kwamapuleti. Kodwa kwezinye izimo, kusacatshangelwa (ikakhulukazi kuyisimo sokusebenzisa amakhono amancane noma, ngokuphambene nalokho, okungaphezulu kwamakhono).

I-capacitance kagesi (ngakho-ke amandla we-capacitor) incike ngqo kumaflethi. Uma sibheka ifomula C = E0 * S / d, lapho iC capacitance, i-E0 iyinani lepharamitha elifana nokuhlala njalo (kulokhu, i-vacuum) futhi d ibanga phakathi kwamapuleti, kungaphetha ngokuthi amandla I-capacitor flat izobe ihlukaniswe ngokulinganayo nenani lebanga eliphakathi kwalawa macwecwe futhi lilingana ngqo nendawo yabo. Uma isikhala esiphakathi kwamapuleti sigcwele isisombululo esithile, amandla we-capacitor kanye nekhono layo liyokwanda ngesici se-E (E kulokhu okuqhubekayo kwe-dielectric).

Ngakho-ke, manje kungenzeka ukuveza ifomula yamandla angaba khona, okuhlanganisa phakathi kwamapulethi amabili (amapulethi) we-condenser: W = q * E * d. Kodwa-ke, kulula kakhulu ukuveza umbono we "condenser energy" ngekhono: W = (C * U * U) / 2.

Amafomula okuxhumeka okufana nokulinganayo ahlala evumelekile kunoma iyiphi inamba yamakhansela axhunyiwe ebhethri.

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