Tus nqi ntawm u0 yog dab tsi?
Tus nqi ntawm u0 yog dab tsi?

Video: Tus nqi ntawm u0 yog dab tsi?

Video: Tus nqi ntawm u0 yog dab tsi?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
Anonim

Cov tus nqi ntawm peb tsis muaj (µ0) lub tus nqi ntawm qhov permeability ntawm qhov chaw dawb yog raws nraim kom txog rau thaum 20th May 2019. mu naught tus nqi : µ0 luas = 4 x 10-7 H/m. kwv yees li µ0 = 12.57 × 10-7 H/m.

Ua li no, tus nqi ntawm mu yog dab tsi?

Hauv electromagnetism, permeability yog qhov ntsuas ntawm qhov tsis kam ntawm cov khoom tiv thaiv kev tsim ntawm magnetic teb, txwv tsis pub hu ua faib inductance hauv kev sib kis kab txoj kev xav. Txog hnub tim 20 lub Tsib Hlis 2019, qhov sib nqus tas li muaj qhov tseeb (txhais tau) tus nqi Μ0 luas = 4 x 107 H / m ≈ 12.57 × 107 H/m.

Ib yam li ntawd, tus nqi ntawm Absalon tsis yog dab tsi? Kuj hu ua permittivity ntawm qhov chaw dawb, nws yog ib qho zoo tagnrho lub cev tas li uas sawv cev rau qhov tseeb dielectric permittivity ntawm lub tshuab nqus tsev. Hauv lwm lo lus, epsilon tsis quantifies lub peev xwm ntawm lub tshuab nqus tsev tso cai rau hluav taws xob teb kab khiav los ntawm. Nws yog kwv yees li 8.854 × 10^-12 farads ib 'meter'.

Kuj tseem paub, tus nqi ntawm mu zero li 4 pi yog dab tsi?

Cov tus nqi ntawm Μ 4 npi × 10 - 7 H m - 1 4 pib imes {10}^{-7} H {m}^{-1} 4 npi ×1 0 -7 hmo-1.

Mu sib npaug li cas?

Tsab ntawv Greek Lower mu (µ) yog siv los sawv cev rau tus lej ua ntej 0.000001 (10 -6 los yog ib lab). Hauv qee cov ntawv, lub cim µ yog cov ntawv luv ntawm micrometer(s) lossis micron(s). Ob lo lus no ob leeg hais txog ib chav tsev ntawm kev hloov chaw sib npaug 0.000001 ' meter ' lossis 0.001 millimeters.

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