Tsis tas li ntawd kawm cov piv txwv ntawm cov resistors parallel thiab cov piv txwv ntawm cov resistors series.
Cov Khoom Siv Resistance Series
Yog tias cov resistors txuas nrog raws li qhia hauv daim duab saum toj no, lawv txuas ua ke. Cov resistors hauv nqe lus nug tuaj yeem yog cov khoom siv resistor, teeb, lossis lwm yam khoom siv hluav taws xob rwb thaiv tsev.
Tus nqi hluav taws xob (Q) yog qhov ruaj khov yog li ntawd tus nqi hluav taws xob txav mus los ntawm kev tiv thaiv 1 (R1 ) = tus nqi hluav taws xob txav mus los ntawm kev tiv thaiv 2 (R2 ) = tus nqi hluav taws xob txav mus los ntawm kev tiv thaiv 3 (R3 ) . Tam sim no hluav taws xob (I) yog tus nqi hluav taws xob ntws thaum lub sijhawm tshwj xeeb (I = Q/t), yog li ntawd tus nqi hluav taws xob hla kev tiv thaiv 1 ( I1 ) = tus nqi hluav taws xob hla kev tiv thaiv 2 ( I2 ) = tus nqi hluav taws xob hla kev tiv thaiv 3 (I3 ) . Hauv lej, tag nrho cov tam sim no hluav taws xob (I) = I1 = I2 = I3.
Ntawm qhov tod tes, qhov hluav taws xob hluav taws xob (V) txo qis thaum lub zog hluav taws xob txav mus los ntawm txhua qhov tsis kam. Lub zog hluav taws xob, tseem hu ua qhov sib txawv ntawm lub zog hluav taws xob, yog lub zog hluav taws xob ib chav ntawm lub zog hluav taws xob. Lub zog hluav taws xob txo qis vim tias lub zog hluav taws xob siv rau hauv txhua qhov tsis kam hluav taws xob. Yog li tag nrho lub zog hluav taws xob (V) yog sib npaug rau qhov sib npaug ntawm cov hluav taws xob hluav taws xob ntawm txhua qhov tsis kam. Kev suav lej, tag nrho lub zog hluav taws xob hluav taws xob (V) = V 1 + V 2 + V 3. V = IR yog li ntawd tag nrho cov hluav taws xob hluav taws xob sib npaug V = IR 1 + IR 2 + IR 3. Lub zog hluav taws xob ntws hauv txhua qhov tsis kam yog tib yam yog li qhov sib npaug no hloov mus rau V = I (R 1 + R 2 + R 3 ).
Raws li qhov sib npaug saum toj no, nws tau xaus lus tias tag nrho cov hluav taws xob tsis kam (R) lossis qhov hloov pauv tsis kam ntawm cov hluav taws xob tsis kam txuas nrog hauv series yog sib npaug rau qhov sib npaug ntawm txhua qhov hluav taws xob tsis kam, lej R = R 1 + R 2 + R 3. Yog tias tsuas muaj ob lub resistors txuas nrog hauv series, tus nqi hloov pauv resistor (R) = R 1 + R 2. Yog tias muaj plaub lub resistors txuas nrog hauv series, tus nqi hloov pauv resistor (R) = R 1 + R 2 + R 3 + R 4. Ib yam li ntawd, yog tias muaj tsib lossis ntau dua tsib lub resistors txuas nrog hauv series.
Piv txwv ntawm qhov teeb meem ntawm series resistor:
1. Muab R 1 = 2 Ω, R 2 = 3 Ω thiab R 3 = 4 Ω. Peb lub resistors txuas ua ke. Tus nqi ntawm lub resistor hloov pauv yog dab tsi? (Ω = Ohm).
Kev Sib Tham
R = R 1 + R 2 + R 3 = 2 + 3 + 4 = 9 Ω.
Qhov tshwm sim no qhia tau hais tias tus nqi tiv thaiv hloov pauv loj dua tus nqi tiv thaiv ntawm txhua lub resistor txuas nrog hauv series.
2. Ob lub resistors R 1 = 50 Ω thiab R 2 = 50 Ω txuas ua ke thiab txuas nrog lub roj teeb 12 Volt. Txheeb xyuas (a) qhov sib npaug ntawm qhov tsis kam (b) qhov hluav taws xob uas hla dhau txhua lub resistor.
Kev Sib Tham
(a) R = R 1 + R 2 = 50 Ω + 50 Ω = 100 Ω.
(b) Kuv = V / R = 12 Volts / 100 Ω = 0,12 Ampere
