Tsab xov xwm hais txog cov Resistors hauv parallel
Yog tias cov resistors txuas nrog zoo li hauv daim duab, cov resistors txuas nrog parallel.
Cov hluav taws xob (cov hluav taws xob = cov nqi hluav taws xob uas ntws thaum lub sijhawm) uas nkag mus rau qhov chaw sib tshuam yog tib yam li cov hluav taws xob tawm ntawm qhov chaw sib tshuam. Muaj ntau qhov sib tshuam yog li tag nrho cov hluav taws xob = qhov ntau ntawm cov hluav taws xob ntws hauv txhua qhov sib tshuam. Kev suav lej, Kuv = Kuv 1 + Kuv 2 + Kuv 3. Thaum qhov sib txawv ntawm lub zog hluav taws xob lossis hluav taws xob hauv txhua qhov sib tshuam yog tib yam.
Kuv = V/R yog li cov kab zauv saum toj no hloov mus rau Kuv = V/R 1 + V/R 2 + V/R 3. Lub zog hluav taws xob sib npaug, yog li cov kab zauv no hloov mus rau Kuv = V (1/R 1 + 1/R 2 + 1/R 3 ). Yog tias qhov sib npaug tsis kam yog 1/R ces kuv = V (1/R). Yog li, 1/R = 1/R 1 + 1/R 2 + 1/R 3.
Cov voj voog sib luag muaj qhov zoo dua, yog tias cov hluav taws xob mus rau ib qho ntawm cov resistors raug tawg, cov hluav taws xob txuas ntxiv mus rau lwm cov resistors. Thaum nyob rau hauv series, yog tias cov hluav taws xob hauv ib lub resistor raug tawg, ces txhua tus resistors yuav tsis raug hluav taws xob.
Piv txwv teeb meem 1:
Paub tias R 1 = 2 Ω, R 2 = 3 Ω. Ob lub resistors yog sib luag. Tus nqi ntawm qhov sib npaug resistor yog dab tsi? (Ω = Ohm).
tshuaj:
1/R = 1/R 1 + 1/R 2 = 1/2 + 1/3 = 3/6 + 2/6 = 5/6
R = 6/5 = 1.2 Ω.
Qhov tshwm sim no qhia tau hais tias tus nqi sib npaug resistor me dua tus nqi ntawm txhua tus parallel resistor.
Piv txwv teeb meem 2:
Ob tug R 1 = 50 Ω thiab 50 resistors txuas ua ke thiab sib luag, txuas nrog lub roj teeb 12 Volt. Txheeb xyuas:
(a) Qhov sib npaug ntawm kev tiv thaiv
(b) Tam sim no hluav taws xob hla txhua lub resistor
tshuaj:
(a) Cov resistors hauv series:
R = R 1 + R 2 = 50 Ω + 50 Ω = 100 Ω.
Cov resistors sib piv:
1/R = 1/R 1 + 1/R 2 = 1/50 + 1/50 Ω = 2/50
R = 50/2 = 25 Ω
(b) Cov Resistors hauv series:
Kuv = V / R = 12 Volts / 100 Ω = 0.12 A
Cov resistors sib piv:
Kuv = V / R = 12 Volts / 25 Ω = 0.48 A
Qhov tshwm sim no qhia tau hais tias tag nrho cov hluav taws xob ntws hauv lub voj voog sib luag yog ntau dua, thaum tag nrho cov hluav taws xob ntws hauv cov koob yog me dua.
