Mafunso a chitsanzo cha Kirchhoff's Law

Zitsanzo 3 za Malamulo a Kirchhoff

1. Yang'anani chithunzi cha closed circuit chomwe chili pambali! Pamene R₁ = 2Ω, R₂ = 4Ω, R₃ = 6Ω, ndiye kuti mphamvu yamagetsi yomwe ikuyenda mu dera ndi...

A. 1,2 Ampere
B. 1,0 Ampere
C. 0,6 Ampere
D. 0,5 Ampere
E. 0,2 Ampere

Zokambirana
Ndizodziwika kuti :
Wotsutsa 1 (R)₁) = 2Ω
Wotsutsa 2 (R)₂) = 4Ω
Wotsutsa 3 (R)₃)= 6Ω
Gwero la emf 1 (E)₁) = 9 V
Gwero la emf 2 (E)₂) = 3 V
Anafunsa Mphamvu ya mphamvu yamagetsi yomwe ikuyenda mu dera (I)
Yankhani :

Funso ili likukhudzana ndi lamulo la Kirchhooff. Masitepe ndi momwe mungayankhire funsoli: Choyamba , sankhani komwe magetsi akupita momwe mukufunira. Mutha kusankha magetsi otsutsana ndi wotchi kapena ozungulira wotchi. Chachiwiri , magetsi akamadutsa mu resistor kapena resistor (R) pamakhala kuchepa kwa mphamvu kotero kuti V = IR ndi negative. Chachitatu , ngati magetsi asuntha kuchokera ku low kupita ku high potential (- mpaka +) ndiye kuti emf source (E) ndi positive chifukwa pali mphamvu yamagetsi mu emf source. Ngati magetsi asuntha kuchokera ku high kupita ku low potential (+ mpaka -) ndiye kuti emf source (E) ndi negative chifukwa pali mphamvu yotulutsa mphamvu mu emf source.

Pothetsa vutoli, njira ya magetsi imasankhidwa kuti ikhale yofanana ndi njira yozungulira wotchi.
- IR₁ +E₁ - IR₂ - IR₃ - E₂ = 0
– 2 Ine + 9 – 4 Ine – 6 Ine – 3 = 0
– 12 I + 6 = 0
– 12 I = – 6
Ine = -6 / -12
Ine = 0,5

Mphamvu yamagetsi yomwe ikuyenda mu dera ndi 0,5 Amperes. Mphamvu yabwino imasonyeza kuti mphamvu yamagetsi ili motsatira momwe ikuyembekezeredwa, motsatira wotchi. Mphamvu yoipa imasonyeza kuti mphamvu yamagetsi ili motsatira wotchi.
Yankho lolondola ndi D.

2. Yang'anani zithunzi zotsatirazi! Kuchuluka kwa mphamvu yamagetsi yomwe ikuyenda mu dera ndi...

A. 0,6 A
B. 1,2 A
C. 1,6 A
D. 2,0 A
E. 2,5 A

Zokambirana
Pothetsa vutoli, njira ya magetsi imasankhidwa kuti ikhale yofanana ndi njira yozungulira wotchi.
-20 – 5I -5I – 12 – 10I = 0
-32 – 20I = 0
-32 = 20I
Ine = -32 / 20
I = -1,6 Ampere
Popeza mphamvu yamagetsi ndi yoipa, njira yeniyeni ya mphamvu yamagetsi ndi yotsutsana ndi wotchi. Njira imeneyi sikugwirizana ndi lingaliro loyamba la kuzungulira mozungulira wotchi.
Yankho lolondola ndi C.

3. Yang'anani chithunzi chotsatira cha magetsi! Kukula kwa mphamvu yamagetsi yomwe ikuyenda mu magetsi ndi…
A. 5/3 A
B. 8/3 A
C. 11/3 A
D. 13/3 A
E. 14/3 A
Zokambirana
Pothetsa vutoli, njira ya magetsi imasankhidwa kuti ikhale yofanana ndi njira yozungulira wotchi.
- Ine - 6I + 12 - 2I + 12 = 0
-9I + 24 = 0
-9I = -24
Ine = 24/9
I = 8 / 3 Ampere
Popeza mphamvu yamagetsi ndi yabwino, njira yamagetsi ndi yofanana ndi kuyerekezera, komwe kuli kozungulira mozungulira wotchi.
Yankho lolondola ndi C.

Gwero la funso:

Mafunso a National Examination Physics a Senior High School/Vocational High School