The Currents in an Electrical Network Are Given by the Solution

question 137

Multiple Choice

The currents in an electrical network are given by the solution of the system $$\left\{ \begin{aligned}I _ { 1 } - I _ { 2 } + I _ { 3 } & = 5 \\3 I _ { 1 } + 4 I _ { 2 } & = 19 \\I _ { 2 } + 3 I _ { 3 } & = 28\end{aligned} \right.$$
Where I₁, I₂ and I₃ are measured in amperes.Solve the system of equations using matrices.

• A)I₁ = 5, I₂ = 4, I₃ = 8
• B)I₁ = 4, I₂ = 4, I₃ = 8
• C)I₁ = 3, I₂ = 4, I₃ = 8
• D)I₁ = 2, I₂ = 4, I₃ = 8
• E)I₁ = 1, I₂ = 4, I₃ = 8

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A scientific theory explaining the movement of the Earth's lithospheric plates and the associated phenomena such as earthquakes.

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Quantities of a mineral that are known to exist with a reasonable degree of certainty and can be recovered economically with the existing technology under current economic conditions.