Maphunziro Oyambira a Fiziki

Nkhani yokhudza Resistivity

Ponena za mphamvu yamagetsi, kuchuluka kwa mphamvu yamagetsi kwafotokozedwa, momwemonso mphamvu yamagetsi yafotokozedwa m'nkhani yokhudza mphamvu yamagetsi. Mphamvu yamagetsi ndi mphamvu yamagetsi zili mu conductor ngati pali kusiyana kwa mphamvu ya conductor, pomwe ngati palibe kusiyana kwa mphamvu yamagetsi, ndiye kuti palibenso mphamvu yamagetsi ndi mphamvu yamagetsi.

Pafupifupi m'makina onse oyendetsera zitsulo, mphamvu yamagetsi imakhala yofanana ndi kuchuluka kwa mphamvu yamagetsi, komwe chiŵerengero cha mphamvu yamagetsi ndi kuchuluka kwa mphamvu yamagetsi chimakhala chokhazikika. Mtengo woyerekeza mphamvu yamagetsi ndi kuchuluka kwa mphamvu yamagetsi umatchedwa resistivity. Mwa masamu, ubale pakati pa mphamvu yamagetsi, kuchuluka kwa mphamvu yamagetsi, ndi resistivity wafotokozedwa mu equation:

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Nkhani yokhudza khodi ya mtundu wa Resistor

The wotsutsa ndi gawo limodzi la dera lamagetsi lomwe limagwira ntchito yowongolera kuchuluka kwa mafunde amagetsi. Kawirikawiri, pali mitundu iwiri ya ma resistors, omwe ndi ma resistors a waya ndi ma resistors a kaboni. Ma resistors a waya nthawi zambiri amagwiritsidwa ntchito mu labotale, opangidwa ndi kukulunga waya wopyapyala pamwamba pa chubu chosungira. Ma resistors a kaboni nthawi zambiri amagwiritsidwa ntchito m'mabwalo amagetsi, ozungulira, ndipo ali ndi mawaya mbali zonse ziwiri. Mtengo wa resistor resistor umafotokozedwa mu mtundu wamakina ndipo umawonetsedwa pamwamba pa resistor.

Mtengo wotsutsa wa resistor ukhoza kudziwika potanthauzira mtundu wa resistor code. Kuti mumvetse izi, choyamba yang'anani tebulo lotsatira, kenako phunzirani chitsanzo cha vutoli kuti mudziwe mtengo wotsutsa resistor.

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Article about the Resistors in series

If the resistors are connected as shown in the figure, the resistors are arranged in series. Resistor or electrical resistance in question can be in the form of resistor components, lights, or other electrical resistance.

The electric charge moves through resistance 1 (R₁) = ndi mtengo wamagetsi moves through resistance 2 (R₂) = the electric charge moves through resistance 3 (R₃). Zamagetsi zamagetsi (I) is an electric charge that flows during a certain time interval (I = Q / t), hence the electric current through resistance 1 (I₁) = electric current through resistance 2 (I₂) = electric current through resistance 3 (I₃). Mathematically, the total electric current (I) = I₁ = Ine₂ = Ine₃.

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Kuyerekeza kwa kukana kwamagetsi

Mu mutu wa lamulo la Ohm, njira yomwe imafotokoza ubale pakati pa Voteji (V), magetsi (Ine), ndi kukana magetsi (R) yachokera. Kufotokozedwa mwa masamu kudzera mu ma equation:

Equation iyi ikuwonetsa kuti kukana kwamagetsi (R) kuli kofanana mwachindunji ndi magetsi amagetsi (V) ndipo kumafanana molakwika ndi magetsi amagetsi (I). Ngati magetsi akuluakulu ali akulu kuposa momwe kukana kwamagetsi kukukulirakulira, m'malo mwake, ngati magetsi amphamvu akukulira kuposa kukana kwamagetsi kudzakhala kwakukulu. Equation iyi ikufotokoza lamulo la Ohm pokhapokha ngati kukana kwamagetsi (R) kuli kokhazikika. Ngati kukana kwamagetsi sikukhazikika, ndiye kuti equation iyi sikufotokoza lamulo la Ohm, koma imafotokoza kukana kwa woyendetsa.

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Nkhani yokhudza Resistors nthawi imodzi

Ngati zotsutsana zilumikizidwa monga momwe zilili pachithunzichi, zotsutsanazo zimalumikizidwa motsatizana.

The magetsi (magetsi = mphamvu yamagetsi yomwe imayenda mkati mwa nthawi) yomwe imalowa pamalo olumikizirana ndi yofanana ndi mphamvu yamagetsi yomwe imatuluka pamalo olumikizirana. Pali malo olumikizirana angapo kotero kuti magetsi onse = kuchuluka kwa magetsi omwe akuyenda pamalo aliwonse olumikizirana. Mwa masamu, I = I₁ + I₂ + I₃Ngakhale kusiyana kwa mphamvu yamagetsi kapena magetsi magetsi mu mphambano iliyonse ndi chimodzimodzi.

I = V/R kotero equation yomwe ili pamwambapa imasintha kukhala I = V/R₁ + V/R₂ + V/R₃Mphamvu yamagetsi ndi yofanana, kotero equation iyi imasintha kukhala I = V (1/R)₁ + 1/R₂ + 1/R₃). Ngati kukana kofanana ndi 1/R ndiye kuti I = V (1/R). Chifukwa chake, 1/R = 1/R₁ + 1/R₂ + 1/R₃.

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Nkhani yokhudza Gwero la mphamvu yamagetsi emf Kukana kwamkati Voltage ya terminal

Zamagetsi zamagetsi imayenda mu closed circuit, kuyambira pa high potential kupita pa low potential. Pamene magetsi akuyenda kudzera mu gawo la kukana kwa magetsi, pamakhala kuchepa kwa mphamvu zamagetsi chifukwa mphamvu zamagetsi zimagwiritsidwa ntchito pa kukana kumeneku. Kuti magetsi apitirize kuyenda kuchokera ku mphamvu yayikulu kupita ku mphamvu yochepa,

Payenera kukhala chipangizo chowonjezera mphamvu zamagetsi, chidacho ndi mphamvu yamagetsi (emf) kapena yodziwika bwino yotchedwa gwero lamagetsi. Emf kapena gwero lamagetsi ndi gawo lomwe limasintha mtundu wa mphamvu kukhala mphamvu zamagetsi, monga mabatire, maselo a dzuwa, kapena majenereta amagetsi.

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Ma EMF otsatizana komanso ofanana

If there are two or more sources of electromotive (emf) connected as shown in the figure, the emf is arranged in series.

Chofanana Voteji source (ε) is:

ε = ε₁ + ndi₂ + ndi_n

The equivalent internal resistance (r) is:

r = r₁ +r₂ +r_n

The electric current flowing through the external resistance (R) is:

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Lamulo loyamba la Kirchhoff lotchedwanso lamulo la malo olumikizirana limati mphamvu yamagetsi yomwe imalowa pamalo olumikizirana ndi yofanana ndi mphamvu yamagetsi yomwe imatuluka pamalo olumikizirana. Malo olumikizirana mu dera lamagetsi ndi malo omwe ma conductor awiri kapena angapo amakumana, monga mfundo a yomwe ili pachithunzi chomwe chili pambali.

Ine ndi mphamvu yamagetsi yomwe imalowa pamalo olumikizirana, pomwe ine₁ ndipo ine₂ ndi mafunde amagetsi omwe amatuluka kuchokera pamalo olumikizirana, I = I₁ + I₂Chitsanzo china, onani chithunzi chili pansipa.

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Lamulo lachiwiri la Kirchhoff limati kusintha kwa mphamvu yamagetsi kuzungulira dera lotsekedwa ndi zero. Lamulo lachiwiri la Kirchhoff limachokera ku lamulo losunga mphamvu, lomwe limati mphamvu ndi yamuyaya.

Kuti mumvetse bwino izi, ganizirani mphamvu yamagetsi ikuyenda mu closed circuit, monga momwe zilili pachithunzichi. Pamene mphamvu yamagetsi imadutsa mu kukana magetsi (R), ndi mphamvu zamagetsi imachepetsedwa chifukwa imagwiritsidwa ntchito pa zotsutsana izi. Ngati mphamvu yamagetsi imadutsa mu mphamvu ina yamagetsi, mphamvu yamagetsi imachepanso chifukwa imagwiritsidwanso ntchito pa mphamvu yamagetsi. Kuphatikiza apo, mphamvu yamagetsi ikadutsa mu gwero lamagetsi kuchokera ku mphamvu yotsika kupita ku mphamvu yayikulu, mphamvu yamagetsi imawonjezeka. Ikabwerera pamalo ake oyamba, mphamvu yamagetsi imakhala yofanana ndi kale, komwe kusintha kwa mphamvu yamagetsi kumakhala zero. Mukagwiritsa ntchito KirchhoffLamulo lachiwiri la magetsi, timagwiritsa ntchito kusintha kwa magetsi, osati kusintha kwa mphamvu zamagetsi.

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Tanthauzo la mphamvu yamagetsi

Mphamvu yomwe imaphunziridwa mu ntchito ndi Mphamvu imatsimikiziridwa ngati ntchito yomwe yachitika panthawi inayake. Ntchito ndi njira yosinthira mphamvu kotero kuti mphamvuyo imvetsetsedwe ngati kusintha kwa mphamvu komwe kumachitika panthawi inayake.

Mphamvu yamagetsi ndi kusintha kwa mphamvu yamagetsi panthawi inayake. Mu ndemanga ya mphamvu yamagetsi, zafotokozedwa kuti kusintha kwa mphamvu yamagetsi kumachitika pamene mphamvu yamagetsi imadutsa m'dera linalake. mphamvu yamagetsi Kusiyana.

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