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Video: Dab tsi yog qhov sib npaug rau tam sim no muaj peev xwm sib txawv thiab tsis kam?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev sib npaug
| Kev sib npaug | Cov cim | Lub ntsiab lus ntawm cov lus |
|---|---|---|
| I = Δ V R I = dfrac{Delta V}{R} I = RΔV | I kuv yog tam sim no , Δ V Delta V ΔV yog hluav taws xob muaj peev xwm sib txawv , thiab R yog tsis kam | Tam sim no yog ncaj qha proportional rau hluav taws xob muaj peev xwm sib txawv thiab inversely proportional rau tsis kam . |
Tom qab ntawd, koj yuav suav li cas tam sim no thiab muaj peev xwm sib txawv tiv thaiv?
Xam tsis kam
- Yuav kom nrhiav tau qhov tsis kam ntawm ib feem, koj yuav tsum ntsuas:
- Qhov tsis kam yog qhov piv ntawm qhov sib txawv ntawm qhov sib txawv rau tam sim no.
- Piv txwv li, 3 A ntws los ntawm 240 V teeb.
- Resistance = 240 ÷ 3 = 80 Ω
- Yog tias koj npaj ib daim duab ntawm tam sim no tawm tsam qhov sib txawv ntawm cov xaim, koj tau txais txoj kab ncaj nraim.
Tsis tas li ntawd, qhov sib npaug ntawm qhov tsis kam yog dab tsi? Rearrange V = IR los daws qhov tsis kam: R = V / I (kuj = hluav taws xob / tam sim no). Txuas cov txiaj ntsig koj pom rau hauv cov qauv no los daws kom tag nrho cov kev tawm tsam. Piv txwv li, ib lub voj voog yog siv los ntawm 12 volt roj teeb, thiab tam sim no ntsuas ntawm 8. cov amps.
Tsuas yog li ntawd, qhov sib npaug ntawm qhov tam sim no voltage thiab tsis kam yog dab tsi?
Ohm txoj cai sib npaug ( qauv ): V = I × R thiab lub zog txoj cai sib npaug ( qauv ): P = I × V. P = hwj chim, I los yog J = Latin: influare, thoob ntiaj teb ampere, los yog siv thiab R = tsis kam. V = voltage, hluav taws xob muaj peev xwm sib txawv Δ V los yog E = electromotive force (emf = voltage).
Dab tsi yog qhov sib npaug rau tam sim no?
Tam sim no tuaj yeem pom los ntawm Ohm txoj cai , V = IR. V yog lub roj teeb hluav taws xob , yog li yog R tuaj yeem txiav txim siab ces qhov tam sim no tuaj yeem suav. Thawj kauj ruam, tom qab ntawd, yog nrhiav qhov tsis kam ntawm cov hlau: L yog qhov ntev, 1.60 m.
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