Txhua tus hauv tsev kawm ntawv kawm physics. Thiab nws tsis pub leejtwg paub tias muaj xws li ib ceg ntawm physics - electrostatics. Dab tsi ntawm science yog "physics"? Cov teeb meem dab tsi hauv physics puas daws teeb meem electrostatics? Thiab feem ntau, nws kawm dab tsi - electrostatics - nws puas koom nrog? Zoo, cia peb sim ua kom tiav.
Nature Science
Cia pib nrog lub ntsiab lus ntawm "physics", electrostatics tuaj yeem tos.
Lub npe ntawm ib qho kev tshawb fawb dav dav tshaj plaws ntawm kev tshawb fawb ntuj los ntawm Greek lo lus qub φύσις - xwm. Physics yog kev tshawb fawb ntawm cov cai ntawm xwm (thiab lawv (cov cai no) tsis yog qhov yooj yim tshaj plaws, tab sis kuj yog qhov dav tshaj), hais txog qhov teeb meem nws tus kheej, nrog rau nws cov qauv thiab nws txoj kev txav. Zoo li lwm yam kev tshawb fawb, physics muaj ntau yam, ntawm cov uas yog electrodynamics, uas tau mob siab rau txoj kev tshawb fawb ntawm electromagnetic teb thiab nws cov kev cuam tshuam nrog lub cev thiab cov khoom uas muaj hluav taws xob. Electrostatics yog ib feem ntawm ceg ntawm physics.
Section ntawm electrodynamics
Electrostatics tau mob siab rau tag nrho lub cev thaum so, muajtus nqi hluav taws xob zoo lossis tsis zoo. Muaj xws li ib yam li "point hluav taws xob nqi" - qhov no yog lub cev uas zoo los yog tsis zoo them, qhov loj thiab cov duab uas yuav tsum tau tsis saib xyuas nyob rau hauv lub chav kawm ntawm kev daws teeb meem no (nyob rau hauv lwm yam lus, yog hais tias tus deb ntawm lub tsheb. lub cev kawm tau ntau dua li lawv qhov ntau thiab tsawg).
Kev sib cuam tshuam ntawm cov nqi no yog txiav txim los ntawm Coulomb txoj cai. Nws hais tias lub zog uas tshwm sim los ntawm kev sib cuam tshuam ntawm ob lub ntsiab lus them nqi ntawm so muaj kev vam khom ncaj qha rau ntawm qhov loj ntawm txhua tus ntawm lawv thiab ib qho kev hloov pauv ntawm qhov xwm txheej ntawm qhov kev ncua deb ntawm cov nqi no. Ntxiv mus, xws li ib tug quab yuam muaj ib tug kev taw qhia raws li txoj kab ntawm kev twb kev txuas ntawm cov nqi txiav txim. Yog li, electrostatics kawm txog cov nqi hluav taws xob thaum so, uas tuaj yeem ua tau zoo lossis tsis zoo.
