Video: Vim li cas induced emf xoom thaum sib nqus flux siab tshaj plaws?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum lub kauj yog upright tsis muaj kev hloov hauv sib nqus flux (i.e emf ua = 0) vim hais tias lub kauj tsis 'txiav hla' cov kab teb. Cov ua emf yog xoom thaum cov coils yog perpendicular rau cov kab teb thiab siab kawg thaum lawv nyob nraum parallel. Nco ntsoov, lub ua emf yog tus nqi hloov hauv sib nqus flux kev sib txuas.
Raws li txoj cai, vim li cas EMF max thaum flux yog xoom?
Los ntawm Faraday txoj cai, qhov loj ntawm induced ua emf yog sib npaug rau tus nqi hloov ntawm cov hlau nplaum flux , yog li nws qhov txiaj ntsig siab tshaj plaws tshwm sim thaum lub flux nkhaus muaj nws txoj kab nqes loj tshaj plaws. Qhov induced ua emf mus dhau xoom thaum lub flux nkhaus muaj xoom txoj kab nqes. Peb pom ib 90o theem hloov ntawm flux thiab induced emf ua.
Yuav ua li cas koj xam qhov siab tshaj plaws induced emf? Faraday txoj cai hais tias: Induced EMF yog sib npaug rau tus nqi ntawm kev hloov ntawm magnetic flux. Sib nqus flux = Sib nqus lub zog x Cheeb Tsam = BA. Yog li ntawd Induced EMF = (hloov hauv Magnetic Flux Density x Area)/hloov hauv Sijhawm. Yog li ntawd, Induced EMF = (Bπr2n) /t.
Kuj Paub, vim li cas qhov induced emf yog qhov siab tshaj plaws thaum lub coil yog sib npaug rau cov hlau nplaum?
Sib nqus flux yog siab kawg thaum lub dav hlau ntawm lub coil yog parallel rau magnetic teb . Thaum armature tig ces vim hloov nyob rau hauv Sib nqus flux ib ua e.m.f yog tsim. Cov xwm txheej ntawm qhov twg e.m.f ua nyob ntawm: Lub zog ntawm e.m.f ua tuaj yeem nce los ntawm, nce tus naj npawb ntawm lem coil . Nce qhov nrawm ntawm coil.
Dab tsi yog qhov siab tshaj plaws emf induced hauv lub kauj?
Koj yuav pom tias tus nqi ntawm e yuav yog siab kawg t = 0. Li no, lub mas emf yog induced thaum lub coil yog parallel rau teb. Tab sis koj hais, nws yog siab kawg thaum lub zog ntawm coil yog perpendicular rau lub teb.
Pom zoo:
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