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Article about Resistivity

Regarding electric current, the density of electric current has been discussed, so also the electric field has been explained in-topic about the electric field. The electric field and electric current are in a conductor if there is a potential difference in the conductor, whereas if there is no potential difference, then there is also no electric field and electric current.

In almost all metal conductors, the electric field is directly proportional to the density of the electric current, where the ratio of the electric field to the density of the electric current is constant. The value of the comparison of the electric field to current density is called resistivity. Mathematically, the relationship between the electric field, current density, and resistivity is stated in the equation:

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Maqaal ku saabsan koodhka midabka Resistor

The iska caabin waa qayb ka mid ah wareegga korantada oo u shaqeeya xakamaynta tirada qulqulka korantada. Guud ahaan, waxaa jira laba nooc oo iska caabin ah, kuwaas oo kala ah iska caabinta gariiradda siligga iyo iska caabinta kaarboonka. Iska caabinta duubka siligga waxaa badanaa loo isticmaalaa shaybaarka, iyadoo lagu duubo siligga khafiifka ah dusha sare ee tuubada dahaarka leh. Iska caabinta kaarboonka waxaa caadi ahaan loo isticmaalaa wareegyada elektaroonigga ah, dhululubo, waxayna leeyihiin fiilooyin labada darafba. Qiimaha iska caabinta iska caabinta kaarboonka waxaa lagu muujiyaa koodka midabka waxaana lagu soo bandhigaa dusha sare ee iska caabinta.

Qiimaha iska caabbinta ee iska caabbinta waxaa lagu garan karaa iyadoo la fasirayo lambarka midabka iska caabbinta. Si aad tan u fahamto, marka hore fiiri jadwalka soo socda, ka dibna baro dhibaatada tusaalaha ah si aad u go'aamiso qiimaha iska caabbinta iska caabbinta.

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Maqaal ku saabsan Resistors-ka taxanaha ah

Haddii iska caabintu ay isku xiran yihiin sida ku cad sawirka, iska caabintu waxay u habaysan yihiin taxane. Iska caabinta ama iska caabinta korontada ee su'aasha laga qabo waxay noqon kartaa qaab qaybaha iska caabinta, nalalka, ama iska caabinta korontada kale.

Dareeraha korontadu wuxuu dhex maraa iska caabinta 1 (R)₁) = ah kharash koronto wuxuu dhex maraa iska caabinta 2 (R)₂) = dallacaadda korontadu waxay dhex martaa iska caabbinta 3 (R₃). Korantada hada jirta (I) waa koronto koronto oo socota muddo cayiman (I = Q / t), sidaas darteedna qulqulka korontada ee dhex mara iska caabinta 1 (I₁) = koronto koronto oo dhex marta iska caabinta 2 (I₂) = koronto koronto oo dhex marta iska caabinta 3 (I₃Xisaab ahaan, wadarta guud ee korantada (I) = I₁ = Aniga₂ = Aniga₃.

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Isle'egta iska caabbinta korontada

Mawduuca sharciga Ohm, qaacido qeexaysa xiriirka ka dhexeeya danab (V), hadda koronto (I), iyo iska caabin koronto (R) ayaa laga soo qaatay. Xisaab ahaan waxaa lagu muujiyay isle'egyada:

Isle'egtan waxay muujinaysaa in iska caabbinta korontada (R) ay si toos ah ugu dhigantaa danabka korontada (V) oo ay si liddi ku ah ugu dhigantaa hadda korontada (I). Haddii danabka ugu weyn uu ka weyn yahay iska caabbinta korontada ayaa sii weynaanaysa, lidkeeda, haddii xoogga korontada uu ka weynaado iska caabbinta korontada ayaa ka weynaan doonta. Isle'egtan waxay sharraxaysaa sharciga Ohm oo keliya marka iska caabbinta korontada (R) ay joogto tahay. Haddii iska caabbinta korontadu aysan joogto ahayn, markaa isle'egtan ma sharraxayso sharciga Ohm, laakiin waxay sharraxaysaa iska caabbinta gudbiyaha.

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Maqaal ku saabsan Resistors-ka oo is barbar socda

Haddii iska caabintu ay isku xiran yihiin sida ku cad sawirka, iska caabintu waxay isku xiran yihiin si is barbar socda.

The hadda koronto (koronto = koronto ku shubaysa inta lagu jiro muddo) oo gala barta isgoyska waa la mid ah korontada ka baxda barta isgoyska. Waxaa jira dhowr isgoys si wadarta guud ee korontada ay u noqoto xaddiga korontada ee ku socota isgoys kasta. Xisaab ahaan, I = I₁ + Aniga₂ + Aniga₃Iyadoo farqiga awoodda korantada ama korantada korantada isgoys kasta waa isku mid.

I = V/R markaa isla'egta kor ku xusan waxay isu beddeshaa I = V/R₁ + V/R₂ + V/R₃Danabka korontadu waa siman yahay, markaa isla'egtan waxay isu beddeshaa I = V (1/R)₁ + 1/R₂ + 1/R₃). Haddii iska caabinta u dhiganta ay tahay 1/R markaas I = V (1/R). Sidaas darteed, 1/R = 1/R₁ + 1/R₂ + 1/R₃.

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Article about Source of electromotive force emf Internal resistance Terminal voltage

Korantada hada jirta flows in a closed circuit, from high potential to low potential. When an electric current moves through a component of electrical resistance, there is a reduction in electrical potential energy because electrical energy is used on this resistance. In order for the electric current to continue to flow from high potential to low potential,

there must be a device to add electrical potential energy, the tool is an electromotive force (emf) or more accurately called an electric voltage source. Emf or a voltage source is a component that converts a type of energy into electrical energy, such as batteries, solar cells, or electricity generators.

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EMF-yada taxanaha ah iyo kuwa is barbar socda

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

U dhiganta danab source (ε) is:

ε = ε₁ + ε₂ + ε_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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Xeerka ugu horreeya ee Kirchhoff wuxuu sidoo kale ugu yeeray xeerka barta isku xirka wuxuu sheegayaa in qulqulka korontada ee gala barta isku xirka uu la mid yahay kan korontada ee ka baxa barta isku xirka. Barta isku xirka ee wareegga korontada waa barta ay ku kulmaan laba ama in ka badan oo ka mid ah labada gudbiye, sida barta a ee sawirka dhinaca.

Aniga ayaa ah korontoda soo gasha barta isgoyska, halka anigana aan ahay₁ iyo aniga₂ waa hirarka korontada ee ka baxa barta isgoyska, I = I₁ + Aniga₂Tusaale kale, fiiri sawirka hoose.

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Kirchhoff’s second rule states that the change in electric potential on the circumference of a closed circuit is zero. Kirchhoff’s second rule is based on the law of conservation of energy, which states that energy is eternal.

To better understand this, imagine the electric charge moving in a closed circuit, as in the figure. When an electric charge passes through an iska caabin koronto (R), the electrical potential energy is reduced because it is used on these resistances. If the electric charge passes through another electrical resistance, the electric potential energy decreases again because it is used again on the resistance. Furthermore, when the electric charge passes through the voltage source from a low potential to a high potential, the electric potential energy increases. When it returns to its original point, the electric potential energy is the same as before, where the change in electrical potential energy is zero. When applying Kirchhoff‘s second rule to an electrical circuit, we use the change in electrical voltage, not the change in electrical potential energy.

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Qeexidda awoodda korantada

Awoodda lagu barto shaqada iyo Tamarta waxaa lagu go'aamiyaa shaqada la qabtay muddo cayiman. Shaqadu waa hab isbeddel tamar ah si awoodda loo fahmo inay tahay isbeddel tamar ah oo dhaca inta lagu jiro waqti cayiman.

Awoodda korontadu waa isbeddel ku yimaada tamarta korontada inta lagu jiro waqti cayiman. Dib u eegis ku saabsan awoodda korontada, waxaa lagu sharraxay in isbeddellada tamarta korontada ee iman karta ay dhacaan marka dallac koronto uu dhex maro meel awoodda korantada faraqa.

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