Usoro sekit eletriki na iguzogide eletriki

Ajụjụ na usoro ihe atụ maka sekit eletriki na nguzogide eletriki

Sekit eletriki

1. Lee eserese sekit eletriki na-esote. Oke ọkụ eletrik na-agafe na resistor 8 Ohm bụ….
A. 1,8 Amperes
B. 1,2 Amperes
C. 0,8 Amperes
D. 0,6 Amperes

Mkparịta ụka
A maara na:
Resistor 1 (R)₁) = 12 Ω
Resistor 2 (R)₂) = 8 Ω
Resistor 3 (R)₃) = 10 Ω
Voltaji eletriki (V) = Voltaji iri na isii
Ajụjụ: Ike dị ugbu a site na R₁
Azịza:

Ọkụ eletrik na-esi n'ike dị elu gaa n'ike dị ala. Ụzọ nke ọkụ eletrik dị na sekit dị n'elu bụ otu ihe ahụ dị ka ụzọ aka elekere.

Ọkụ na-esi na batrị apụta:
Buru ụzọ gbakọọ ihe nnọchi resistor (R). Mgbe nke ahụ gasịrị, gbakọọ ihe ugbu a site na iji usoro iwu Ohm: V = IR ma ọ bụ I = V / R ebe V = voltaji, I = ugbu a, R = ihe nnọchi resistor.

Ihe nnọchi anya:
Nguzogide R₁ na ihe mgbochi R₂ E doziri ya n'usoro. Ihe nnọchi resistor bụ:
R₁₂ =R₁ + R₂ = 12 + 8 = 20 Ω
Nguzogide R₁₂ na ihe mgbochi R₃ E doziri ya n'otu oge. Ihe nnọchi resistor bụ:
1/R = 1/R₁₂ +1/R₃ = 1/20 + 1/10 = 1/20 + 2/20 = 3/20
R = 20/3 Ω

Ọkụ na-esi na batrị apụta:
I = V / R = 12: 20/3 = 12 x 3/20 = 36/20 = 1,8 Amperes
Ọkụ eletrik nke na-esi na batrị apụta bụ 1,8 amperes.

Ọkụ eletrik na-agafe site na ihe mgbochi 8 Ω
Ike eletrik = Volt 12
R₁₂ = 20 Ω
R₃ = 10 Ω

Ọkụ eletrik na-agafe site na ihe mgbochi 10 Ω
I₃ = V_ab /r₃ = Volt 12 / 10 Ω = Ampere 1,2
Ọkụ eletrik na-agafe site na ihe mgbochi 20 Ω
I₁₂ = V_ab /r₁₂ = Volt 12 / 20 Ω = Ampere 0,6

Iwu Mbụ nke Kirchhoff kwuru na ọkụ eletrik na-abanye n'alaka bụ otu ihe ahụ ọkụ eletrik na-apụ n'alaka ahụ. Dabere na... Iwu mbụ nke Kirchhoff a kwubiri na ọkụ eletrik na-agafe na resistor 20 Ω = ọkụ eletrik na-agafe na resistor 12 Ω = ọkụ eletrik na-agafe na resistor 8 Ω = 0,6 Amperes.
Azịza ziri ezi bụ D.

2.
Lezienụ anya na sekit eletriki mechiri emechi a!
Ọ bụrụ na eleghara nguzogide dị na isi iyi voltaji anya, mgbe ahụ ọdịiche dị n'etiti nsọtụ nke nguzogide 6 Ohm bụ….
A. Volt 3
B. Volt 2
C. 2/3 Volt
D. 1/3 Volt
Mkparịta ụka
A maara na:
Nguzogide 1 = 4 Ω
Nguzogide 2 = 3 Ω
Nguzogide 3 = 6 Ω
Voltaji (V) = voltaji 6
Ajụjụ: Enwere ike inwe ọdịiche dị n'etiti njedebe nke resistor 6 ohm
Azịza:
Njikọta resistor 3 Ω na resistor 3 Ω n'otu oge. Resistor nnọchi bụ:
1/R23 = 1/3 Ω + 1/6 Ω = 2/6 Ω + 1/6 Ω = 3/6 Ω
R23 = 6/3 Ω = 2 Ω

A na-ejikọ resistor 4 Ω na resistor 2 Ω n'usoro. Resistor ndị nnọchi bụ:
R = 4 Ω + 2 Ω = 6 Ω

Ike nke ọkụ eletrik na-esi na isi iyi voltaji apụta:
I = V / R = 6 volts / 6 ohms = 1 Ampere
A na-ejikọ resistor 4 Ω na resistor 2 Ω n'usoro ka dịka iwu mbụ nke Kirchooff si dị, ọkụ eletrik na-agafe resistor 4 Ω hà nhata ọkụ eletrik na-agafe resistor 2 Ω = 1 Ampere.

Ihe dị iche nwere ike ịdị n'etiti isi ihe a na b:
V = IR = (1 Ampere)(2 Ohms) = 2 volts
Ihe dị iche n'etiti isi ihe a na b = ihe dị iche n'etiti nsọtụ nke ihe nguzogide 2 Ω = ihe dị iche n'etiti nsọtụ nke ihe nguzogide 3 Ω = ihe dị iche n'etiti nsọtụ nke ihe nguzogide 6 Ω = volt 2.
Azịza ziri ezi bụ B.

Nguzogide eletriki

3. Ihe mgbochi eletriki atọ, ọ bụrụ na edobere ha n'otu oge, uru mgbochi bụ 12/11 Ohm, ọ bụrụ na edobere ha n'usoro, uru ahụ bụ 12 Ohm, mgbe ahụ uru nke mgbochi ọ bụla bụ...
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
Mkparịta ụka
Ọ bụrụ na edoziri nguzogide eletriki n'usoro, a na-agbakọ nguzogide nhata site na iji usoro a:
R=R₁ + R₂ + R₃
12=R₁ + R₂ + R₃
Azịza B na D nwere ike ịbụ.
Ọ bụrụ na edoziri iguzogide eletriki n'otu oge, a na-agbakọ nguzogide nhata site na iji usoro a: 1/R = 1/R₁ +1/R₂ +1/R₃.
Ọ bụrụ na ị jiri azịza B, mgbe ahụ:
1/R = 1/2 + 1/4 + 1/6
1/R = 6/12 + 3/12 + 2/12
1/R = 11/12
R = 12/11
Azịza ziri ezi bụ B.

Ụdị ihe mgbochi

4. Nguzogide nke tungsten na tin bụ 5,5 x 10 n'otu n'otu.^-8 Mita Ohm na 22 x 10^-8 Mita Ohm. Waya tungsten na waya tin dị mita ise n'ogologo nke ọ bụla. Ọ bụrụ na waya abụọ ahụ nwere otu uru iguzogide na dayameta nke tungsten bụ 2 mm mgbe ahụ dayameta nke waya ndu bụ... mmm
A. 2
B. 4
C. √2
D. ½ √2
Mkparịta ụka
A maara na:
Nguzogide Tungsten (ρ)₁) = 5,5 x 10^-8 Ohm mita
Resistance nke tin (ρ)₂) = 22 x 10^-8 Ohm mita
Ogologo waya tungsten (L)₁) = mita 5
Ogologo waya ndu (L)₂) = mita 5
Dayameta Tungsten (D)₁) = 2mm
Gburugburu Tungsten (R)₁) = 1/2 (D) = 1/2 (2 mm) = 1 mm = 1 x 10^-3 mita
Ajụjụ: Dayameta nke ndu (D)₂)
Azịza:
Mpaghara elu nke waya tungsten:
A₁ = π r² = π (10^-3)² = π 10^-6

Uru iguzogide nke waya tungsten na waya tin bụ otu.
R₁ =R₂
ρ₁ L₁ / EGO₁ = ρ₂ L₂ / EGO₂
(5,5 x 10.)^-8)(5) / π 10^-6 = (22 x 10 ihe^-8)(5) / π r²
5,5 / 10^-6 = 22 / r²
5,5 r² = 22 x10^-6
r² = (22 x 10 ihe^-6 ) /5,5
r² = 4 x10^-6
r = 2 x 10^-3 mita
r = 2 millimita
Azịza ziri ezi bụ A.

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