Video: Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
raws li peb paub tias, tag nrho flux los ntawm a caj q yog q /ε0 (Gauss txoj cai). Yog tus nqi yog on ces kaum ntawm a kub , ib co flux nkag rau hauv kub thiab nplooj dhau ib co nws ntsej muag. Tab sis qee qhov ntawm flux tsis nkag rau hauv kub . Qhov 1/8th no yuav muab faib ua 3 ntu dua.
Ib sab ntawm no, dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab taw tes ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
raws li peb paub tias, tag nrho flux los ntawm a caj q yog q /ε0 (Gauss txoj cai). Yog tias nqi yog on ces kaum ntawm a kub , ib co flux nkag rau hauv kub thiab nplooj dhau ib co nws ntsej muag. Tab sis qee qhov ntawm flux tsis nkag rau hauv kub . Qhov 1/8th no yuav muab faib ua 3 ntu dua.
Dab tsi yog qhov hluav taws xob flux los ntawm ib lub voos xwmfab ntawm sab 1 cm uas nyob rau hauv ib qho hluav taws xob dipole? Nws yuav yog xoom. Txij li net them ntawm a dipole yog zero. Yog li ntawd, flux dhau tus kub yuav zero.
Qhov sib thooj, dab tsi yog qhov hluav taws xob flux los ntawm ib sab ntawm lub voos xwmfab?
Cov kub yog lub cev symmetrical nrog 6 lub ntsej muag thiab raws li cov lus nug, tus nqi taw tes yog nyob ntawm nws qhov chaw. Yog li flux ib ntsej muag = flux (tag nrho)/6=q/6ε0. Txawm li cas los xij yog tias tus nqi tsis nyob ntawm qhov chaw ces cov lus teb yuav txawv. A point charge = 2 × 10−3 yog muab tso rau ntawm qhov chaw ntawm a kub luas = 25.
Dab tsi yog qhov hluav taws xob flux hla ntawm qhov chaw?
Gauss Txoj Cai. Tag nrho cov hluav taws xob flux tawm ntawm qhov kaw nto yog sib npaug rau tus nqi uas muab faib los ntawm cov permittivity. Cov hluav taws xob flux los ntawm ib cheeb tsam yog txhais raws li lub hluav taws xob teb multiplied los ntawm cheeb tsam ntawm lub nto projected nyob rau hauv ib lub dav hlau perpendicular rau lub teb.
Pom zoo:
Dab tsi yog qhov kev sib raug zoo ntawm thaj chaw saum npoo thiab ntim ntawm lub voos xwmfab?
Rau qhov cubes me dua qhov no, thaj chaw saum npoo yog ntau dua piv rau qhov ntim ntau dua li nws nyob hauv qhov loj dua (qhov ntim ntau dua piv rau thaj chaw saum npoo). qhia meej meej tias raws li qhov loj ntawm ib yam khoom nce (tsis hloov pauv), qhov piv txwv no txo qis
Cov kab lus hloov sab hauv cov ces kaum piav qhia txoj haujlwm ntawm ob lub kaum sab xis li cas?
Hloov sab hauv cov ces kaum yog tsim los ntawm ib tug transversal intersecting ob parallel kab. Lawv nyob nruab nrab ntawm ob qho tib si kab tab sis nyob rau sab nraud ntawm lub transversal, tsim ob khub (plaub tag nrho cov ces kaum) ntawm cov ces kaum sab hauv. Hloov cov ces kaum sab hauv yog congruent, txhais tau tias lawv muaj qhov sib npaug
Dab tsi yog qhov cross section ntawm lub voos xwmfab?
Ib qho taw tes (ib qho vertex ntawm lub voos xwmfab) ib kab ntu (ib ntug ntawm lub voos xwmfab) daim duab peb sab (yog tias peb lub ntsej muag uas nyob ib sab ntawm lub voos xwmfab sib tshuam) ib qho parallelogram (yog tias ob khub ntawm lub ntsej muag rov sib tshuam - qhov no suav nrog lub rhombus lossis duab plaub) ib lub trapezium (yog tias ob khub ntawm
Dab tsi yog qhov flux los ntawm ib lub ntsej muag ntawm lub voos xwmfab?
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Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees