Nkhani yokhudza Resistors nthawi imodzi
Ngati zotsutsana zilumikizidwa monga momwe zilili pachithunzichi, zotsutsanazo zimalumikizidwa motsatizana.
Mphamvu yamagetsi (magetsi = mphamvu yamagetsi yomwe imayenda mkati mwa nthawi) yomwe imalowa pamalo olumikizirana ndi yofanana ndi mphamvu yamagetsi yomwe imatuluka pamalo olumikizirana. Pali malo olumikizirana angapo kotero kuti mphamvu yonse yamagetsi = kuchuluka kwa mphamvu yamagetsi yomwe ikuyenda pamalo olumikizirana. Mwa masamu, I = I 1 + I 2 + I 3 . Ngakhale kusiyana kwa mphamvu yamagetsi kapena mphamvu yamagetsi pamalo olumikizirana ndi yofanana.
I = V/R kotero equation yomwe ili pamwambapa imasintha kukhala I = V/R 1 + V/R 2 + V/R 3. Voltage yamagetsi ndi yofanana, kotero equation iyi imasintha kukhala I = V (1/R 1 + 1/R 2 + 1/R 3 ). Ngati kukana kofanana ndi 1/R ndiye kuti I = V (1/R). Chifukwa chake, 1/R = 1/R 1 + 1/R 2 + 1/R 3.
Ma circuit ofanana ali ndi ubwino, ngati magetsi amagetsi kupita ku resistors imodzi asweka, magetsi amagetsi amapitilira kuyenda kupita ku resistors zina. Pomwe motsatizana, ngati magetsi amagetsi mu resistors imodzi asweka, ndiye kuti resistors zonse sizidzapatsidwa magetsi.
Chitsanzo cha vuto 1:
Amadziwika kuti R1 = 2 Ω, R2 = 3 Ω. Ma resistors onsewa ndi ofanana. Kodi mtengo wa resistor yofanana ndi wotani? (Ω = Ohm).
yankho;
1/R = 1/R 1 + 1/R 2 = 1/2 + 1/3 = 3/6 + 2/6 = 5/6
R = 6/5 = 1.2 Ω.
Zotsatirazi zikusonyeza kuti mtengo wofanana wa resistor ndi wocheperapo kuposa mtengo wa resistor iliyonse yofanana.
Chitsanzo cha vuto 2:
Ma resistors awiri a R 1 = 50 Ω ndi 50 alumikizidwa motsatizana komanso motsatizana, olumikizidwa ku batri ya 12 Volt. Dziwani:
(a) Kukana kofanana
(b) Mphamvu yamagetsi kudzera mu resistor iliyonse
yankho;
(a) Zotsutsa motsatizana:
R = R 1 + R 2 = 50 Ω + 50 Ω = 100 Ω.
Zotsutsa zomwe zili motsatizana:
1/R = 1/R 1 + 1/R 2 = 1/50 + 1/50 Ω = 2/50
R = 50/2 = 25 Ω
(b) Zotsutsa motsatizana:
I = V / R = 12 Volts / 100 Ω = 0.12 A
Zotsutsa zomwe zili motsatizana:
I = V / R = 12 Volts / 25 Ω = 0.48 A
Zotsatirazi zikusonyeza kuti mphamvu yonse yamagetsi yomwe ikuyenda mu dera lofanana ndi yayikulu, pomwe mphamvu yonse yamagetsi yomwe ikuyenda mu mndandanda ndi yaying'ono.
