Fomura yeSimba reMagetsi Pamari yePoindi mbiri
Pengantar
Simba remagetsi nderimwe remasimba makuru mufizikisi anodzora kudyidzana pakati pezvikamu zvinoridzwa. Pfungwa iyi yakatanga kuunzwa naCharles-Augustin de Coulomb muzana remakore rechi18, uye yakazozivikanwa seMutemo waCoulomb. Chinyorwa chino chichakurukura zvakadzama fomura yesimba remagetsi pakati pemapoinzi maviri, maitiro ekuriverenga, uye mamwe mashandisirwo aro.
Mutemo waCoulomb
Mutemo waCoulomb unoti simba riri pakati pemapoinzi maviri rinoenderana zvakananga nechibereko chemari uye rinoenderana nechikamu chedaro riri pakati pawo. Pamasvomhu, mutemo uyu unonzi:
\[ F = k_e \frac{|q_1 q_2|}{r^2} \]
Di mana:
– \( F \) isimba remagetsi (Newton, N),
– \( k_e \) ndiyo Coulomb constant (\( 8.99 \times 10^9 \, \text{N m}^2 \text{C}^{-2} \)),
– \( q_1 \) uye \( q_2 \) ndiwo hukuru hwemhosva yekutanga neyechipiri (Coulomb, C),
– \( r \) ndiyo daro riri pakati pemachaji maviri (mita, m).
Simba rinobuda rinogona kukwezva kana kutsamwisa, zvichienderana nerudzi rwechaji. Sekunge chaji dzinodzingana, nepo chaji dzakasiyana dzichikwezvana.
Kuverenga Simba reMagetsi
Ngatitarisei muenzaniso chaiwo kuti tinzwisise mashandisirwo emutemo waCoulomb mukuverenga.
Muenzaniso 1: Mari mbiri dzakafanana
Ngatitii tine machaji maviri akanaka, \( q_1 = 5 \times 10^{-6} \, \text{C} \) uye \( q_2 = 3 \times 10^{-6} \, \text{C} \), akaparadzaniswa nedaro re 0.1 mita.
Kutanga, tinobatanidza maitiro aya mufomura:
\[ F = 8.99 \nguva 10^9 \frac{(5 \nguva 10^{-6})(3 \nguva 10^{-6})}{(0.1)^2} \]
Zvadaro, tinoverenga mhedzisiro:
\[ F = 8.99 \kawa 10^9 \frac{15 \kawa 10^{-12}}{0.01} \]
\[ F = 8.99 \kawa 10^9 \kawa 1.5 \kawa 10^{-9} \]
\[ F = 13.485 \, \mashoko{N} \]
Simba iri remagetsi re13.485 Newtons isimba rinodzongonyedza nekuti machaji maviri aya ndeerudzi rumwe chete (positive).
Muenzaniso 2: Mari mbiri dzemhando dzakasiyana
Zvino, ngatitii tine imwe chete yekuchaja yakanaka \( q_1 = 5 \times 10^{-6} \, \text{C} \) uye imwe chete yekuchaja yakaipa \( q_2 = -3 \times 10^{-6} \, \text{C} \), yakaparadzaniswa nedaro re 0.1 mita.
Zvakare, tinobatanidza tsika idzi mufomura:
\[ F = 8.99 \nguva 10^9 \frac{(5 \nguva 10^{-6})(-3 \nguva 10^{-6})}{(0.1)^2} \]
Sezvo tichingoda hukuru hwesimba chete, tinofuratira chiratidzo chekusateerera chiri mukuverenga kwekutanga:
\[ F = 8.99 \kawa 10^9 \frac{15 \kawa 10^{-12}}{0.01} \]
\[ F = 8.99 \kawa 10^9 \kawa 1.5 \kawa 10^{-9} \]
\[ F = 13.485 \, \mashoko{N} \]
Simba iri remagetsi re13.485 Newtons isimba rinokwezva nekuti machaji maviri aya ane mhando dzakasiyana (dzakanaka nedzisina kunaka).
Mashandisirwo eSimba reMagetsi
Kunzwisisa masimba emagetsi kune mashandisirwo akasiyana-siyana muhupenyu hwezuva nezuva uye tekinoroji. Mamwe mashandisirwo akakosha anosanganisira:
1. Maseketi emagetsi
Mukugadzira nekuongorora macircuit emagetsi, masimba emagetsi ari pakati pemapoinzi emagetsi akakosha. Zvikamu zvemacircuit zvinoshanda zvichibva pamisimboti yemagetsi neminda yemagetsi inogadzirwa nemacharges.
2. Tekinoroji yeKukwanisa Kugona
Capacitor mudziyo unochengetedza simba remagetsi mumunda wemagetsi. Nheyo yekushanda kwecapacitor yakavakirwa pasimba remagetsi riri pakati pechaji dzinochengetwa pamaplate ekufambisa akaparadzaniswa nezvinhu zve dielectric.
3. Electrostatics muindasitiri
Electrostatics inoshandiswa mumabasa akasiyana-siyana emaindasitiri, akadai sekupfapfaidza pendi nemagetsi, kupatsanurwa kwezvinhu nemagetsi, uye mukugadzira tekinoroji yekunyora nekudhinda nelaser.
4. Minda yeMagetsi muBiology
Mubhayoloji, masimba emagetsi anoita basa rakakosha mukushanda kwemasero. Semuenzaniso, kugona kwekuita mumasero etsinga kunoenderana nekufamba kwemaion anotungamirirwa nemasimba emagetsi, zvichiita kuti zviratidzo zvifambe mutsinga.
Munda weMagetsi neMasimba eMagetsi
Munda wemagetsi (\( E \)) ipfungwa ine chekuita nesimba remagetsi. Munda wemagetsi panzvimbo imwe unotsanangurwa sesimba payuniti yekuchaja iyo ingaonekwa nekuchaja kwekuyedza panzvimbo iyoyo:
\[ E = \frac{F}{q} \]
Di mana:
– \( E \) ndiyo nzvimbo yemagetsi (volts pamita, V/m),
– \( F \) isimba remagetsi (Newton, N),
– \( q \) ndiyo muripo wekuyedza (Coulomb, C).
Kana tikaziva simba remagetsi panguva imwe chete, tinogona kuverenga simba remagetsi richasangana nechaji \( q \) panguva iyoyo:
\[ F = qE \]
Veki yeSimba reMagetsi
Simba remagetsi huwandu hwevector, zvichireva kuti rine hukuru uye gwara. Kutungamira kwesimba remagetsi pakati pemapoinzi maviri kunoenderana nezviratidzo zvemapoinzi. Kune mapoinzi akafanana, simba rinoasundira kure (kudzora), nepo kune mapoinzi akasiyana, simba rinoadhonzera kune mumwe nemumwe (kukwezva).
Kana machaji asiri mumutsara wakatwasuka, tinofanira kushandisa musimboti we "vector superposition" kuti tiwane simba rose rinoonekwa nechaji. Musimboti we "superposition" unoti simba rose ihuwandu hwe "vector" hwemasimba ega ega ari kushanda pachaji.
Mhedziso
Fomura yesimba remagetsi, inotsanangurwa neMutemo waCoulomb, inopa hwaro hwekunzwisisa kudyidzana kuripo pakati pemari yemagetsi. Nekushandisa fomura iyi, tinogona kuverenga hukuru negwara resimba rinoshanda pakati pemari mbiri. Kunzwisisa uku hakungokoshi chete mumamiriro efizikisi yedzidziso asiwo kune mashandisirwo akawanda anoshanda mutekinoroji nemaindasitiri.
Kuburikidza nemienzaniso yekuverenga uye tsananguro dzemashandisirwo anoshanda, tinogona kuona kuti pfungwa yesimba remagetsi yakapararira uye yakakosha sei muhupenyu hwezuva nezuva uye mukuvandudzwa kwetekinoroji. Nekuramba tichiongorora nekunzwisisa misimboti iyi mikuru, tinogona kugadzira mhinduro itsva kumatambudziko akasiyana-siyana ehunyanzvi nesainzi.
