Предмет: Физика, автор: balabay0604

2. В електричному колі зображеною на рисунку R1 = 3 Ом, R2 = 6 Ом, R3 = 4 Ом Знайдіть R, I, I1, I2, I3, U1, U2, U3 якщо напруга на зображеній ділянці кола дорівнює 36 В.

Приложения:

Ответы

Автор ответа: DedStar
34

Ответ:

Объяснение:

Дано:

R₁ = 3 Ом

R₂ = 6 Ом

R₃ = 4 Ом

U = 36 В

__________

R - ?

I - ?

I₁ - ?

I₂ - ?

I₃ - ?

U₁ - ?

U₂ - ?

U₃ - ?

1)

Сопротивления R₁ и R₂ соединены параллельно, поэтому:

R₁₂ = R₁·R₂/(R₁+R₂) = 3·6 / (3+6) = 2 Ом

R = R₁₂ + R₃ = 2 + 4 = 6 Ом

2)

I = I₁₂ = I₃ = U / R = 36 / 6 = 6 А

3)

U₃ = I₃R₃ = 6·4 = 24 В

4)

U₁₂ = U₁ = U₂ = U - U₃ = 36 - 24 = 12 В

5)

I₁ = U₁ / R₁ = 12 / 3 = 4 А

I₂ = U₂/R₂ = 12 / 6 = 2 А

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