Chitsanzo cha Mafunso Okambirana za Magetsi Omwe Amagwiritsidwa Ntchito Mwachindunji
Mphamvu yamagetsi yolunjika (DC) ndi chinthu chodziwika bwino mu uinjiniya ndi fizikisi. Mphamvu yamagetsi yolunjika ndi kayendedwe ka ma elekitironi mbali imodzi kudzera mu kondakitala, nthawi zambiri kuchokera ku positive terminal kupita ku negative terminal mu circuit. M'nkhaniyi, tifufuza zitsanzo zingapo za mavuto ndi zokambirana zawo zokhudzana ndi magetsi amagetsi olunjika kuti tithandize kumvetsetsa bwino nkhaniyi.
1. Mndandanda wa Madera
Funso 1:
Popeza pali dera lotsatizana lokhala ndi zotsutsana zitatu, chilichonse chokhala ndi ma values a 4Ω, 6Ω, ndi 10Ω, cholumikizidwa ku gwero la voltage la 20V. Werengani mphamvu yamagetsi yomwe ikuyenda mu derali.
Kukambirana:
Choyamba, tifunika kuwerengera kukana konse mu seti yotsatizana. Mu seti yotsatizana, kukana konse (R_total) ndi chiwonkhetso cha kukana kulikonse.
\[ R_{\text{total}} = R_1 + R_2 + R_3 \]
\[ R_{\text{total}} = 4Ω + 6Ω + 10Ω = 20Ω \]
Pambuyo pake, timagwiritsa ntchito lamulo la Ohm powerengera mphamvu yamagetsi. Lamulo la Ohm limati \( V = I \times R \). Chifukwa chake, mphamvu yamagetsi (I) ikhoza kuwerengedwa ndi:
\[ I = \frac{V}{R_{\text{total}}} \]
\[ I = \frac{20V}{20Ω} = 1A \]
Kotero, mphamvu yamagetsi yomwe ikuyenda mu dera ndi 1 ampere.
2. Dera Lofanana
Funso 2:
Ma resistors atatu okhala ndi kukana kwa 3Ω, 6Ω, ndi 12Ω amalumikizidwa motsatizana ndipo amalumikizidwa ku gwero la voteji ya 12V. Werengani mphamvu yamagetsi yomwe ikuyenda kudzera mu resistor iliyonse.
Kukambirana:
Pa dera lozungulira, mphamvu yamagetsi (V) pa resistor iliyonse ndi yofanana ndipo ndi yofanana ndi mphamvu yamagetsi yochokera. Choyamba, timawerengera mphamvu yamagetsi iliyonse pogwiritsa ntchito lamulo la Ohm.
\[ I_1 = \frac{V}{R_1} = \frac{12V}{3Ω} = 4A \]
\[ I_2 = \frac{V}{R_2} = \frac{12V}{6Ω} = 2A \]
\[ I_3 = \frac{V}{R_3} = \frac{12V}{12Ω} = 1A \]
Mphamvu yamagetsi yomwe ikuyenda kudzera mu resistor iliyonse ndi 4A, 2A, ndi 1A.
Kuphatikiza apo, tikhoza kuwerengera mphamvu yonse yochokera ku gwero pogwiritsa ntchito lamulo la Kirchoff lomwe limati mphamvu yonse yolowera mu mfundo ndi yofanana ndi mphamvu yochoka mu mfundo:
\[ I_{\text{total}} = I_1 + I_2 + I_3 = 4A + 2A + 1A = 7A \]
3. Kuphatikiza kwa Ma Circuits Otsatizana ndi Ofanana
Funso 3:
Ma resistors anayi okhala ndi ma values 4Ω, 6Ω, 12Ω, ndi 12Ω amakonzedwa mu dera lophatikizana, lomwe ndi 4Ω ndi 6Ω amakonzedwa motsatizana, kenako zotsatira zake zimakonzedwa motsatizana ndi 12Ω, ndipo pamapeto pake zimakonzedwa motsatizana ndi 12Ω yachitatu. Ngati gwero la magetsi ndi 24V, dziwani kuchuluka kwa magetsi omwe akuyenda mu derali.
Kukambirana:
Gawo loyamba ndikuwerengera kukana kwa dera loyamba la mndandanda.
\[ R_{\text{series}} = 4Ω + 6Ω = 10Ω \]
Kenako, timaphatikiza zotsatira zomwe zili pamwambapa ndi 12Ω mu dongosolo lofanana.
\[ \frac{1}{R_{\text{parallel}}} = \frac{1}{10Ω} + \frac{1}{12Ω} \]
\[ \frac{1}{R_{\text{parallel}}} = \frac{6}{60} + \frac{5}{60} = \frac{11}{60} \]
\[ R_{\text{parallel}} = \frac{60}{11}Ω \pafupifupi 5.45Ω \]
Tsopano, tayika zotsatira izi motsatizana ndi 12Ω yomaliza.
\[ R_{\text{total}} = R_{\text{parallel}} + 12Ω \]
\[ R_{\text{total}} = 5.45Ω + 12Ω = 17.45Ω \]
Kuti tipeze mphamvu yonse, timagwiritsa ntchito lamulo la Ohm:
\[ I_{\text{total}} = \frac{V}{R_{\text{total}}} \]
\[ I_{\text{total}} = \frac{24V}{17.45Ω} \pafupifupi 1.38A \]
4. Mphamvu mu Circuit
Funso 4:
Popeza pali resistor yokhala ndi mtengo wa 5Ω ndi mphamvu yodutsa mu resistor ya 2A, werengani mphamvu yomwe resistor yataya.
Kukambirana:
Mphamvu (P) ikhoza kuwerengedwa pogwiritsa ntchito fomula iyi:
\[ P = I^2 \nthawi R \]
\[ P = (2A)^2 \nthawi 5Ω \]
\[ P = 4 \kuwirikiza 5 = 20W \]
Kotero, mphamvu yomwe resistor imataya ndi 20 watts.
5. Kuthekera kwa Mfundo mu Dera
Funso 5:
Circuit imakhala ndi zotsutsa ziwiri za 10Ω ndi 20Ω chilichonse cholumikizidwa motsatizana ndi gwero la voteji ya 30V. Werengani mphamvu yomwe ili pakati pa zotsutsa ziwirizo.
Kukambirana:
Choyamba, timawerengera mphamvu yamagetsi yomwe ikuyenda mu dera.
\[ R_{\text{total}} = 10Ω + 20Ω = 30Ω \]
\[ I = \frac{30V}{30Ω} = 1A \]
Kuthekera kwa malo pakati pa ma resistors awiri kungapezeke powerengera kutsika kwa magetsi pa resistor yoyamba.
\[ V_{10Ω} = I \nthawi R_1 = 1A \nthawi 10Ω = 10V \]
Motero, kuthekera pakati pa ma resistors awiriwa ndi \( 30V – 10V = 20V \).
Mapeto
Nkhaniyi yafotokoza mavuto angapo a zitsanzo ndi mayankho awo okhudzana ndi ma circuit amagetsi olunjika. Izi zikuphatikizapo ma circuit otsatizana, ofanana, ndi ophatikizana, komanso kuwerengera mphamvu ndi mphamvu pazigawo zosiyanasiyana. Kumvetsetsa bwino mfundo zazikuluzikulu izi ndikofunikira kwa aliyense amene amaphunzira zamagetsi ndi zamagetsi. Kuchita masewera olimbitsa thupi nthawi zonse ndi mitundu yosiyanasiyana ya mavuto kungathandize kwambiri pakudziwa bwino nkhaniyi.
