Thaum drift tshaj tawm yog xoom?

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Thaum drift tshaj tawm yog xoom?
Thaum drift tshaj tawm yog xoom?

Video: Thaum drift tshaj tawm yog xoom?

Video: Thaum drift tshaj tawm yog xoom?
Video: zoo nyob tshaj plaw yog thaum koj xoom ceev2 es los Phev kiag 2024, Kaum ib hlis
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Hauv physics, qhov nrawm nrawm yog qhov nruab nrab tshaj tawm los ntawm cov khoom siv hluav taws xob, xws li electrons, hauv cov khoom vim muaj hluav taws xob. Feem ntau, ib qho hluav taws xob hauv ib tus neeg xyuas pib yuav nthuav tawm ntawm Fermi tshaj tawm, ua rau qhov nruab nrab tshaj tawm ntawm xoom.

Vim li cas electron drift tshaj xoom thaum tsis muaj daim ntawv thov?

Txawm li cas los xij cov hluav taws xob txuas ntxiv tawg tawm ntawm lub lattice ntawm cov hlau atoms yog li kev taw qhia ntawm cov hluav taws xob hluav taws xob yog randomized thiab qhov nruab nrab tshaj tawm txheeb ze rau lub lattice ntawm hlau atoms yog xoom. Lub drift tshaj tawm yog qhov nruab nrab tshaj tawm, yog li thaum tsis muaj ib qho kev thov, qhov nrawm nrawm yog xoom.

Dab tsi yog qhov nrawm nrawm ntawm cov hluav taws xob dawb?

Nws txhais tau tias yog nruab nrab tshaj tawm uas cov hluav taws xob dawbtau txav mus rau qhov kawg ntawm tus neeg xyuas pib (tawm tsam rau hluav taws xob teb) nyob rau hauv kev cuam tshuam ntawm sab nraud hluav taws xob.

Puas nrawm nrawm tsis muaj sijhawm?

Yog, drift tshaj tawm yog ywj siab ntawm lub sijhawm Kev nrawm nrawm yog vim li cas vim li cas tam sim no ntws hauv tus neeg xyuas pib. Nyob rau hauv lub derivation ntawm qhov sib npaug ntawm drift tshaj tawm, peb pom tau hais tias acceleration "a" yog tas li thiab so lub sij hawm "乁" yog khaws cia tas mus li. Yog li tam sim no thiab nrawm nrawm tsis nyob ntawm lub sijhawm.

Vim li cas drift velocity hu li ?

Subatomic particles zoo li electrons txav mus rau hauv cov lus qhia random txhua lub sijhawm. Thaum cov hluav taws xob raug rau hauv hluav taws xob lawv txav mus los, tab sis lawv maj mam txav mus rau hauv ib qho kev taw qhia, nyob rau hauv cov kev taw qhia ntawm hluav taws xob teb thov. Lub net tshaj tawm uas cov electrons drift yog hu ua drift velocity.

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