4 Piv txwv ntawm Cov Teeb Meem Resistor Parallel
Tsis tas li ntawd kawm cov ntaub ntawv ntawm cov resistors parallel thiab piv txwv ntawm cov teeb meem resistor series , piv txwv ntawm cov teeb meem hluav taws xob tsis kam.
1. Muab hais tias R 1 = 2 Ω thiab R 2 = 4 Ω txuas ua ke. Tus nqi ntawm lub resistor hloov pauv yog dab tsi? (Ω = Ohm).
Kev Sib Tham
1/R = 1/R 1 + 1/R 2 = 1/2 + 1/4 = 2/4 + 1/4 = 3/4
R = 4/3 Ω
Tus nqi ntawm qhov tsis kam hloov pauv yog ntau dua li tus nqi ntawm txhua lub resistor txuas nrog hauv series.
2. R.R1 = 1 Ω, R2 = 2 Ω, R3 = 3 Ω. Tus nqi hloov resistor yog…..
Kev Sib Tham
1/R = 1/R 1 + 1/R 2 + 1/R 3 = 1/1 + 1/2 + 1/3 = 6/6 + 3/6 + 2/6 = 11/6
R = 6/11 Ω.
3. R 1 = 4 Ω, R 2 = 2 Ω, V = 12 Volts. Txheeb xyuas (a) tus nqi ntawm lub resistor hloov (b) cov hluav taws xob ntws hauv lub voj voog (c) cov hluav taws xob hla dhau cov resistors R 1 thiab R 2
Kev Sib Tham
(a) Hloov cov resistor
1/R = 1/R 1 + 1/R 2 = 1/4 + 1/2 = 1/4 + 2/4 = 3/4
R = 4/3 Ω.
(b) Tam sim no hluav taws xob hauv lub voj voog
Kuv = V / R = 12 : 4/3 = 12 x 3/4 = 9 Amperes
(c) Cov hluav taws xob hla dhau cov resistors R 1 thiab R 2
Qhov sib txawv ntawm ob qho kawg ntawm R1 = qhov sib txawv ntawm ob qho kawg ntawm R2 = 12 Volts.
Kuv 1 = V / R 1 = 12 / 4 = 3 Amperes
Kuv 2 = V / R 2 = 12 / 2 = 6 Amperes
Qhov tshwm sim no yog raws li Kirchhoff txoj cai thawj zaug :
Kuv = Kuv 1 + Kuv 2
9 A = 3 A + 6 A
4. R1 = 2 Ω, R2 = 4 Ω, R3 = 6 Ω, R4 = 8 Ω, V = 12 Volts. Txheeb xyuas (a) Tus nqi ntawm lub resistor hloov (b) Cov hluav taws xob ntws hauv lub voj voog (c) Cov hluav taws xob ntws los ntawm lub resistor R2 (d) Lub zog hluav taws xob ntawm ob qho kawg ntawm lub resistor R4.
Kev Sib Tham
(a) Hloov cov resistor
1/R = 1/R 1 + 1/ R 2 + 1/R 3 + 1/R 4 = 1/2 + 1/4 + 1/6 + 1/8 = 12/24 + 6/24 + 4/24 + 3/24 = 25/24
R = 24/25 Ω
(b) Hluav taws xob hla dhau lub voj voog
Kuv = V / R = 12: 24/25 = 12 x 25/24 = 1 x 25/2 = 12,5 A ampere
(c) Tam sim no hluav taws xob hla dhau resistor R1, R2, R3, R4
Qhov sib txawv ntawm ob qho kawg ntawm R1 = qhov sib txawv ntawm ob qho kawg ntawm R2 = qhov sib txawv ntawm ob qho kawg ntawm R3 = qhov sib txawv ntawm ob qho kawg ntawm R4 = 12 Volts.
Kuv 1 = V / R 1 = 12 / 2 = 6 Amperes
Kuv 2 = V / R 2 = 12 / 4 = 3 Amperes
Kuv 3 = V / R 3 = 12 / 6 = 2 Amperes
Kuv 4 = V / R 4 = 12 / 8 = 1,5 Amperes
Qhov tshwm sim no yog raws li Kirchhoff txoj cai thawj zaug:
Kuv = Kuv 1 + Kuv 2
12,5 A = 6 A + 3 A + 2 A + 1,5 A
(D)
Qhov sib txawv ntawm ob qho kawg ntawm R1 = qhov sib txawv ntawm ob qho kawg ntawm R2 = qhov sib txawv ntawm ob qho kawg ntawm R3 = qhov sib txawv ntawm ob qho kawg ntawm R4 = 12 Volts.
