Isibonelo Semibuzo Ekhuluma Ngezisekethe Zikagesi
Amasekethe kagesi ayisihloko esibalulekile ku-physics kanye nobunjiniyela kagesi. Ukuqonda ukuthi amasekethe asebenza kanjani nokuthi ungabala kanjani amanani kubalulekile kunoma ubani onentshisekelo kubunjiniyela kagesi noma ukusebenza ngamadivayisi kagesi. Lesi sihloko sizomboza izibonelo eziningana zezinkinga zamasekethe kagesi kanye nezincazelo zazo njengereferensi kubafundi nochwepheshe abafuna ukujulisa ulwazi lwabo.
Isingeniso Sezifunda Zikagesi
Ngokuvamile, isekethe kagesi iqukethe izingxenye eziningana eziyisisekelo ezifana nama-resistors, ama-capacitor, ama-inductor, kanye nemithombo ye-voltage noma yamanje. Lezi zingxenye zixhunywe ekucushweni okuthile ukuze zenze imisebenzi ethile, njengokuhlunga amasignali noma ukukhulisa noma ukunciphisa i-voltage. Ekuhlaziyweni kwesekethe, imithetho ka-Ohm kanye nekaKirchhoff ivame ukusetshenziswa ukubala i-current kanye ne-voltage kusekethe.
Isibonelo Inkinga 1: Isekethe Yochungechunge Olulula
Umbuzo:
Uma unikezwe isekethe yochungechunge equkethe ama-resistor amathathu \( R1 = 2 \Omega \), \( R2 = 3 \Omega \), kanye \( R3 = 5 \Omega \) axhunywe emthonjeni we-voltage \( V = 10 V \). Bala ukugeleza kwamandla kagesi kusekethe kanye ne-voltage ku-resistor ngayinye.
Ingxoxo:
1. Thola Ukumelana Okuphelele:
Kumjikelezo wochungechunge, ukumelana okuphelele kuyisamba sazo zonke ukumelana ngakunye.
\[
R_{\text{total}} = R1 + R2 + R3 = 2 \Omega + 3 \Omega + 5 \Omega = 10 \Omega
\]
2. Thola Umsinga Ogelezayo:
Ngokusho komthetho ka-Ohm, ugesi ungabalwa kanje:
\[
I = \frac{V}{R_{\text{total}}} = \frac{10 V}{10 \Omega} = 1 A
\]
3. Thola i-Voltage ku-Resistor ngayinye:
I-voltage kuyo yonke i-resistor ibalwa kanje:
\[
V_{R1} = I \izikhathi R1 = 1 A \izikhathi 2 \Omega = 2 V
\]
\[
V_{R2} = I \izikhathi R2 = 1 A \izikhathi 3 \Omega = 3 V
\]
\[
V_{R3} = I \izikhathi R3 = 1 A \izikhathi 5 \Omega = 5 V
\]
Ngakho-ke, ugesi ogeleza kusekethe ungu-1 A, kanti i-voltage kuyo yonke i-resistor ingu-2 V, 3 V, kanye no-5 V, ngokulandelana.
Isibonelo Umbuzo 2: Isekethe Ehambisanayo Elula
Umbuzo:
Uma unikezwe isekethe ehambisanayo equkethe ama-resistor amathathu \( R1 = 6 \Omega \), \( R2 = 3 \Omega \), kanye \( R3 = 2 \Omega \) axhunywe emthonjeni we-voltage \( V = 12 V \). Bala ugesi ngokusebenzisa i-resistor ngayinye.
Ingxoxo:
1. Ugesi ku-Resistor ngayinye:
Kusekhethi ehambisanayo, i-voltage enqamula i-resistor ngayinye iyafana futhi ilingana ne-voltage yomthombo. Ngakho-ke, i-current enqamula i-resistor ngayinye ibalwa kusetshenziswa umthetho we-Ohm.
\[
I_{R1} = \frac{V}{R1} = \frac{12 V}{6 \Omega} = 2 A
\]
\[
I_{R2} = \frac{V}{R2} = \frac{12 V}{3 \Omega} = 4 A
\]
\[
I_{R3} = \frac{V}{R3} = \frac{12 V}{2 \Omega} = 6 A
\]
Ngakho-ke, ugesi odlula ku-resistor ngayinye u-2 A, 4 A, kanye no-6 A ngokulandelana.
Isibonelo Umbuzo 3: Inhlanganisela Yezijikelezo Ezilandelanayo Nezilandelanayo
Umbuzo:
Uma unikezwe isekethe ehlanganisiwe equkethe i-\( R1 = 4 \Omega \), \( R2 = 2 \Omega \), kanye ne-\( R3 = 3 \Omega \). \( R2 \) kanye ne-\( R3 \) zixhunywe ngokulingana, bese zixhunywe ngochungechunge ne-\( R1 \) kanye nomthombo we-voltage \( V = 15 V \). Bala ugesi kanye ne-voltage kuyo yonke i-resistor.
Ingxoxo:
1. Thola ukumelana okulinganayo kwe-\( R2 \) kanye ne-\( R3 \):
\[
\frac{1}{R_{\text{parallel}}} = \frac{1}{R2} + \frac{1}{R3} = \frac{1}{2 \Omega} + \frac{1}{3 \Omega} = \frac{3 + 2}{6} = \frac{5}{6 \Omega}
\]
\[
R_{\text{parallel}} = \frac{6}{5} \Omega = 1,2 \Omega
\]
2. Ukumelana Okuphelele:
\[
R_{\text{total}} = R1 + R_{\text{parallel}} = 4 \Omega + 1,2 \Omega = 5,2 \Omega
\]
3. Isamba Samanje:
\[
I_{\text{total}} = \frac{V}{R_{\text{total}}} = \frac{15 V}{5,2 \Omega} \cishe kube ngu-2,88 A
\]
4. I-Voltage ku-\( R1 \):
\[
V_{R1} = I_{\text{total}} \times R1 = 2,88 A \times 4 \Omega \approx 11,52 V
\]
5. I-Voltage ku-\( R2 \) kanye ne-\( R3 \):
Njengoba i-\( R2 \) kanye ne-\( R3 \) zihambisana, ama-voltage afanayo:
\[
V_{\text{parallel}} = V – V_{R1} = 15 V – 11,52 V \cishe kube ngu-3,48 V
\]
6. Thola ugesi ku-\( R2 \) kanye ne-\( R3 \):
\[
I_{R2} = \frac{V_{\text{parallel}}}{R2} = \frac{3,48 V}{2 \Omega} \cishe kube ngu-1,74 A
\]
\[
I_{R3} = \frac{V_{\text{parallel}}}{R3} = \frac{3,48 V}{3 \Omega} \cishe kube ngu-1,16 A
\]
Ngakho-ke, ugesi ogeleza kusekethe cishe u-2,88 A. I-voltage kuyo yonke i-\(\R1 \) cishe i-11,52 V, kanti i-voltage kuyo yonke i-\(\R2 \) kanye ne-\(R3 \) cishe i-3,48 V. Ugesi kuyo yonke i-\(\R2 \) ungu-1,74 A kanti kuyo yonke i-\(\R3 \) ingu-1,16 A.
Isiphetho
Lesi sihloko sixoxa ngezibonelo eziningana zezinkinga zesekethe ezilula nezihlanganisiwe, kanye nezinyathelo zokuzixazulula. Ukuqonda imiqondo eyisisekelo nendlela yokusebenzisa imithetho ka-Ohm noKirchhoff kwenza kube lula ukuxazulula izinkinga zesekethe ezahlukahlukene. Ukuzijwayeza njalo ngezinkinga ezahlukahlukene kungathuthukisa ukuqonda kwakho kanye nekhono lokuhlaziya isekethe kagesi. Kulabo abafuna ukuqonda okujulile, kunconywa ukuthi ujule kakhulu ezintweni ezikumasekethe e-AC, izihlungi, kanye nokuhlaziywa kwesizinda semvamisa.
