Mekhoa ea potoloho ea motlakase le khanyetso ea motlakase

Mehlala ea lipotso le mekhoa ea lipotoloho tsa motlakase le khanyetso ea motlakase

Lipotoloho tsa motlakase

1. Sheba setshwantsho se latelang sa potoloho ya motlakase. Boholo ba motlakase o phallang ka hara resistor ya 8 Ohm ke….
A. 1,8 Li-ampere
B. 1,2 Ampere
C. 0,8 Ampere
D. 0,6 Ampere

Puisano
Hoa tsebahala hore:
Mohanyetsi 1 (R)₁) = 12 Ω
Mohanyetsi 2 (R)₂) = 8 Ω
Mohanyetsi 3 (R)₃) = 10 Ω
Motlakase oa motlakase (V) = Li-volt tse 12
Potso: Matla a hona joale ho pholletsa le R₁
Karabo:

Motlakase o phalla ho tloha ho bokgoni bo phahameng ho ya ho bokgoni bo tlase. Tsela eo motlakase o tsamayang ka yona potolohong e ka hodimo e tshwana le tsela eo matsoho a oache a tsamayang ka yona.

Motlakase o phallang ka betring:
Qala ka ho bala resistor e nkang sebaka (R). Kamora moo, bala hona joale o sebedisa foromo ya molao wa Ohm: V = IR kapa I = V / R moo V = voltage, I = hona jwale, R = resistor e nkang sebaka.

Sehanyetsi se nkelang sebaka:
Mohanyetsi R₁ le mohanyetsi R₂ e hlophisitsoe ka tatellano. Resistor e nkelang sebaka ke:
R₁₂ =R₁ + R₂ = 12 + 8 = 20 Ω
Mohanyetsi R₁₂ le mohanyetsi R₃ e hlophisitsoe ka ho bapa. Resistor e nkelang sebaka ke:
1/R = 1/R₁₂ +1/R₃ = 1/20 + 1/10 = 1/20 + 2/20 = 3/20
R = 20/3 Ω

Motlakase o phallang ka betring:
I = V / R = 12 : 20/3 = 12 x 3/20 = 36/20 = 1,8 Ampere
Motlakase o phallang ka betri ke 1,8 Amperes.

Motlakase o phallang ka har'a resistor ea 8 Ω
Vab = 12 Volt
R₁₂ = 20 Ω
R₃ = 10 Ω

Motlakase o phallang ka har'a resistor ea 10 Ω
I₃ =V_ab / R₃ = Li-volt tse 12 / 10 Ω = 1,2 Ampere
Motlakase o phallang ka har'a resistor ea 20 Ω
I₁₂ =V_ab / R₁₂ = Li-volt tse 12 / 20 Ω = 0,6 Ampere

Molao oa Pele oa Kirchhoff o bolela hore motlakase o kenang lekaleng o tšoana le motlakase o tsoang lekaleng leo. Ho latela... Molao oa pele oa Kirchhoff Ho fihletswe qeto ya hore motlakase o fetang ka hara kganetso ya 20 Ω = motlakase o fetang ka hara kganetso ya 12 Ω = motlakase o fetang ka hara kganetso ya 8 Ω = 0,6 Ampere.
Karabo e nepahetseng ke D.

2.
Ela hloko potoloho e latelang ea motlakase e koetsoeng!
Haeba khanyetso e mohloling oa motlakase e hlokomolohuoa, joale phapang e ka bang teng lipakeng tsa lipheletso tsa khanyetso ea 6 Ohm ke….
A. 3 Volt
B. 2 Volt
C. 2/3 Volt
D. 1/3 Volt
Puisano
Hoa tsebahala hore:
Mohanyetsi 1 = 4 Ω
Mohanyetsi 2 = 3 Ω
Mohanyetsi 3 = 6 Ω
Motlakase (V) = li-volt tse 6
Potso: Phapang e ka bang teng lipakeng tsa lipheletso tsa resistor ea 6 Ohm
Karabo:
Resistor ea 3 Ω le resistor ea 3 Ω li hokahane ka ho lekana. Resistor e nkelang sebaka ke:
1/R23 = 1/3 Ω + 1/6 Ω = 2/6 Ω + 1/6 Ω = 3/6 Ω
R23 = 6/3 Ω = 2 Ω

Resistor ea 4 Ω le resistor ea 2 Ω li hokahane ka tatellano. Resistor tse nkelang sebaka ke:
R = 4 Ω + 2 Ω = 6 Ω

Matla a motlakase o tswang mohloding wa motlakase:
I = V / R = 6 volts / 6 ohms = 1 Ampere
Sehanyetsi sa 4 Ω le sehanyetsi sa 2 Ω di hokahantswe ka tatellano e le hore ho ya ka molao wa pele wa Kirchooff, motlakase o fetang ka hara resistor ya 4 Ω o lekane le motlakase o fetang ka hara resistor ya 2 Ω = 1 Ampere.

Phapang e ka bang teng pakeng tsa lintlha tsa a le b:
V = IR = (1 Ampere)(2 Ohms) = 2 volts
Phapang e ka bang teng pakeng tsa lintlha a le b = phapang e ka bang teng pakeng tsa lipheletso tsa resistor ea 2 Ω = phapang e ka bang teng pakeng tsa lipheletso tsa resistor ea 3 Ω = phapang e ka bang teng pakeng tsa lipheletso tsa resistor ea 6 Ω = 2 volts.
Karabo e nepahetseng ke B.

Khanyetso ea motlakase

3. Li-resistor tse tharo tsa motlakase, haeba li hlophisitsoe ka ho lekana, boleng ba khanyetso ke 12/11 Ohm, haeba li hlophisitsoe ka letoto boleng ke 12 Ohm, joale boleng ba khanyetso ka 'ngoe ke...
A. 1 Ohm, 2 Ohm, 3 Ohm
B. 2 Ohm, 4 Ohm, 6 Ohm
C. 1 Ohm, 3 Ohm, 5 Ohm
D. 3 Ohm, 4 Ohm, 5 Ohm
Puisano
Haeba khanyetso ea motlakase e hlophisitsoe ka tatellano, khanyetso e lekanang e baloa ho sebelisoa foromo:
R = R₁ + R₂ + R₃
12 = R₁ + R₂ + R₃
Likhetho tse ka bang teng ke likarabo B le D.
Haeba khanyetso ea motlakase e hlophisitsoe ka ho lekana, khanyetso e lekanang e baloa ho sebelisoa foromo: 1/R = 1/R₁ +1/R₂ +1/R₃.
Haeba o sebelisa karabo ea B, joale:
1/R = 1/2 + 1/4 + 1/6
1/R = 6/12 + 3/12 + 2/12
1/R = 11/12
R = 12/11
Karabo e nepahetseng ke B.

Mofuta oa mokoallo

4. Ho hanyetsa ha tungsten le tin ke 5,5 x 10 ka ho latellana.^-8 Methara ea Ohm le 22 x 10^-8 Methara ea ohm. Terata ea tungsten le terata ea thini li bolelele ba limithara tse 5 ka 'ngoe. Haeba lithapo ka bobeli li na le boleng bo tšoanang ba khanyetso 'me bophara ba tungsten e le 2 mm joale bophara ba terata ea loto ke... mmm
A. 2
B. 4
C. √2
D. ½ √2
Puisano
Hoa tsebahala hore:
Ho hanyetsa ha Tungsten (ρ)₁) = 5,5 x 10^-8 Methara ea Ohm
Ho hanyetsa tin (ρ)₂) = 22 x 10^-8 Methara ea Ohm
Bolelele ba terata ea tungsten (L)₁) = limithara tse 5
Bolelele ba terata ea loto (L)₂) = limithara tse 5
Bophara ba tungsten (D)₁) = 2 mm
Radiyo ea Tungsten (R)₁) = 1/2 (D) = 1/2 (2 mm) = 1 mm = 1 x 10^-3 mitha
E botsitsweng: Bophara ba loto (D)₂)
Karabo:
Sebaka sa terata ea tungsten:
A₁ = π r² = π (10^-3)² = π 10^-6

Boleng ba khanyetso ea terata ea tungsten le terata ea tin boa tšoana.
R₁ =R₂
ρ₁ L₁ / TO₁ = ρ₂ L₂ / TO₂
(5,5x10^-8)(5) / π 10^-6 = (22 x 10^-8)(5) / π r²
5,5 / 10^-6 = 22 / r²
5,5 r² = 22x10^-6
r² = (22 x 10^-6 ) / 5,5
r² = 4x10^-6
r = 2 x 10^-3 mitha
r = 2 dimilimithara
Karabo e nepahetseng ke A.

Mohloli oa lipotso:

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