Malo Ogulitsira Magetsi Ofanana
Mphamvu yamagetsi ndi lingaliro lofunikira mu fizikisi lomwe limasonyeza kuyanjana pakati pa zinthu zamagetsi. Mu ntchito zambiri zothandiza, makamaka mu uinjiniya ndi zamagetsi, nthawi zambiri timakumana ndi zochitika pamene mphamvu yamagetsi imapangidwa ndi mbale zofananira zomwe zimayendetsedwa. Ma mbale ofananira awa ali ndi ntchito zosiyanasiyana, kuyambira ma capacitor ndi zida zamankhwala mpaka zida zosiyanasiyana zamagetsi. Nkhaniyi ikambirana za mphamvu yamagetsi m'ma mbale ofananira mozama, kuyambira lingaliro loyambira mpaka ntchito zake zothandiza.
Lingaliro Loyambira la Mphamvu Yamagetsi
Kawirikawiri, mphamvu yamagetsi imapangidwa ndi mphamvu yamagetsi ndipo imatha kufotokozedwa ngati mphamvu yomwe imakumana ndi mphamvu yaying'ono ya positive ikayikidwa pamalo enaake mumlengalenga. Kuchuluka kumeneku kumafotokozedwa ndi vector yamagetsi yamagetsi E, yomwe ili ndi mayunitsi a Newtons pa Coulomb (N/C) kapena Volts pa mita (V/m).
Kuti timvetse mphamvu ya magetsi m'ma plate ofanana, tiyamba ndi lamulo la Coulomb, lomwe limati mphamvu pakati pa ma point charges awiri ndi yofanana ndi kukula kwa ma charges ndipo imafanana ndi sikweya ya mtunda pakati pawo. Komabe, pankhani ya ma plate ofanana, tikulankhula za kugawa kwa ma charges pamwamba, osati ma point charges.
Mapepala Ofanana Odzaza
Taganizirani ma plate awiri oyendetsera magetsi omwe ali moyang'anizana ndi mtunda waung'ono pakati pawo. Mbale imodzi ili ndi mphamvu yabwino ya +Q, pomwe mbale inayo ili ndi mphamvu yoipa ya -Q. Izi nthawi zambiri zimagwiritsidwa ntchito popanga ma capacitor, omwe ndi zinthu zofunika kwambiri m'mabwalo osiyanasiyana amagetsi.
Pamene mbale ziwiri zikuchajidwa, mphamvu yamagetsi imapangidwa pakati pawo. Chifukwa cha kufalikira kwa mphamvu pamwamba pa mbale (poganiza kuti mbalezo ndi zazikulu kwambiri poyerekeza ndi mtunda womwe uli pakati pawo), mphamvu yamagetsi pakati pa mbalezo ndi yofanana ndipo ingaganizidwe kuti ndi yokhazikika patali pang'ono kuchokera m'mphepete mwa mbalezo.
Munda Wamagetsi Pakati pa Mbale Zofanana
Mphamvu yamagetsi pakati pa mbale ziwiri zoyenderana zitha kudziwika pogwiritsa ntchito lamulo la Gauss. Lamulo la Gauss la magetsi limati mphamvu yamagetsi yonse kudzera pamalo otsekedwa imagwirizana mwachindunji ndi mphamvu yonse yomwe yatsekedwa ndi pamwambapo.
Pa mbale zofanana, timasankha malo a Gaussian okhala ndi mzere wozungulira womwe uli ndi mzere wolunjika ku mbale ndi mbale kumapeto onse a silinda. Chifukwa cha kusinthasintha kwa vutoli, gawo lamagetsi E ndi lolunjika ku malo a mbale ndipo limakhala lokhazikika pakati pa mbalezo.
Kutuluka kwa magetsi pamwamba pa silinda ya Gaussian kumathandizidwa ndi malekezero awiri a silinda yomwe ili pakati pa mbale. Poganiza kuti malo a pamwamba pa mbale ndi A, timapeza:
\[ \Phi = E \cdot A – (-E \cdot A) = 2EA \]
Malinga ndi lamulo la Gauss:
\[ \Phi = \frac{Q_{\text{in}}}{\varepsilon_0} \]
Kumene \( Q_{\text{charge}} \) ndi ndalama zonse zomwe zili pa mbale ndipo \(\varepsilon_0\) ndi chilolezo cha vacuum. Popeza ndalama zomwe zili pa mbale imodzi ndi \(+Q\),
\[ 2EA = \frac{Q}{\varepsilon_0} \]
Kotero gawo lamagetsi E pakati pa mbale ndi:
\[ E = \frac{Q}{2A \cdot \varepsilon_0} \]
Komabe, popeza pali mbale yoyaka kwambiri yomwe imayambitsa kufalikira kwa magetsi m'munda, mphamvu yonse yamagetsi imabwera chifukwa cha izi:
\[ E = \frac{Q}{A \cdot \varepsilon_0} \]
Izi zikusonyeza kuti mphamvu yamagetsi pakati pa mbale zofanana ndi yofanana ndipo imadalira kukula kwa mphamvu, dera la mbale, ndi kulola kwa sing'anga pakati pa mbale.
Kugwiritsa Ntchito Magetsi Pa Mapepala Ofanana
Kapastor
Ma capacitor ndi amodzi mwa magwiritsidwe ntchito ofala kwambiri a ma plate ofanana omwe ali ndi chaji. Capacitor imakhala ndi ma plate awiri ofanana omwe amalekanitsidwa ndi dielectric. Ma capacitor amatha kusunga mphamvu zamagetsi m'munda wamagetsi womwe umapangidwa pakati pa ma plate. Capacitance, C, ya capacitor imafotokozedwa ngati chiŵerengero cha chaji Q chomwe chimasungidwa ndi ma plate ku voltage V kudutsa ma plate:
\[ C = \frac{Q}{V} \]
Ndi mphamvu yamagetsi pakati pa mbale:
\[ E = \frac{V}{d} \]
ndi kusinthitsa mphamvu:
\[ C = \varepsilon_0 \cdot \frac{A}{d} \]
Masensa Opanikizika ndi Maikolosikopu a Elektroni
Mphamvu yamagetsi yodutsa m'mapepala ofanana imagwiritsidwanso ntchito mu masensa okakamiza mphamvu, komwe kusintha kwa mtunda pakati pa ma mbale chifukwa cha kupanikizika kumatha kuyezedwa kudzera mu kusintha kwa mphamvu. Mu ma microscopy a ma elekitironi, mphamvu yamagetsi yofanana pakati pa ma mbale ofanana imagwiritsidwa ntchito kufulumizitsa ndikuwongolera kuyenda kwa ma elekitironi.
Kuwonetsera Kwamagetsi
Ma screen a Liquid Crystal Display (LCD) amagwiritsa ntchito mphamvu yamagetsi pakati pa mbale zofanana kuti azitha kuyang'anira momwe mamolekyu amadzimadzi amadzimadzi amayendera, motero amawongolera kusintha kwa kuwala ndikupanga chithunzi chowonetsera.
Mapeto
Mphamvu yamagetsi yofanana pakati pa mbale ziwiri zofanana imapereka zabwino zambiri pakugwiritsa ntchito ukadaulo wosiyanasiyana. M'maphunziro komanso m'machitidwe, kumvetsetsa mphamvu yamagetsi m'mbale zofanana kumatithandiza kumvetsetsa ma capacitor, masensa, ndi zida zina zamagetsi zosiyanasiyana. Kuyenda kwa mphamvu yoyendetsedwa kudzera mu kapangidwe ka thupi ndi mfundo zakuthupi kumapangitsa machitidwe awa kukhala chinthu chofunikira kwambiri pakupanga zatsopano zaukadaulo kuyambira nthawi zakale mpaka zamakono.
Mwa kufufuza m'makhalidwe ndi kuwerengera kwa magetsi m'magawo ofanana, sitingolimbitsa maziko a mphamvu zamagetsi ndi maginito okha, komanso timatsegula chitseko cha mapulogalamu atsopano omwe akugwirizana ndi chitukuko cha ukadaulo wapadziko lonse lapansi.
