Question

An application of Kirchhoff's Rules to the circuit shown results in the following system of equations: $$\left\{\begin{array}{l}I_{1} =I_{3}+I_{2} \\24-6 I_{1}-3 I_{3} =0 \\12+24-6 I_{1}-6 I_{2} =0\end{array}\right.$$ Find the currents $I_{1}, I_{2},$ and $I_{3}$.

Name: Problem 84, Chapter 8: College Algebra
Uploaded: 2021-09-30T19:10:43-08:00
Duration: 2 min 20 s
Channel: Reinhart Du Plessis
Description: An application of Kirchhoff's Rules to the circuit shown results in the following system of equations: { I1 =I3+I2 24-6 I1-3 I3 =0 12+24-6 I1-6 I2 =0 . Find the currents I1, I2, and I3.

   An application of Kirchhoff's Rules to the circuit shown results in the following system of equations:
$$\left\{\begin{array}{l}I_{1} =I_{3}+I_{2} \\24-6 I_{1}-3 I_{3} =0 \\12+24-6 I_{1}-6 I_{2} =0\end{array}\right.$$
Find the currents $I_{1}, I_{2},$ and $I_{3}$.

College Algebra

Michael Sullivan 9th Edition

Chapter 8, Problem 84

Instant Answer

Solved by Expert Reinhart Du Plessis

09/30/2021

Step 1

This gives us: \begin{align*} I_{1} - I_{2} - I_{3} &= 0, \\ -6I_{1} - 3I_{3} &= -24, \\ -6I_{1} - 6I_{2} &= -36. \end{align*} Show more…

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An application of Kirchhoff's Rules to the circuit shown results in the following system of equations: $$\left\{\begin{array}{l}I_{1} =I_{3}+I_{2} \\24-6 I_{1}-3 I_{3} =0 \\12+24-6 I_{1}-6 I_{2} =0\end{array}\right.$$ Find the currents $I_{1}, I_{2},$ and $I_{3}$.

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Key Concepts

Kirchhoff's Current Law (KCL)

This principle states that the total current entering a junction must equal the total current leaving it. In circuit analysis, KCL is used to set up relationships between the currents at nodes where multiple branches intersect, ensuring the conservation of charge.

Kirchhoff's Voltage Law (KVL)

This law asserts that the sum of the electrical potential differences (voltage) around any closed loop in a circuit is zero. KVL is essential in creating equations that relate the sources of voltage (like batteries) and the drops across resistive elements, helping to account for energy conservation in the circuit.

Systems of Linear Equations

When applying Kirchhoff's laws, the resulting relationships between currents and voltages often lead to a system of linear equations. These systems can be solved using methods such as substitution or matrix operations to find the values of unknown circuit parameters.

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