📘 electric circuits

1. **ปัญหา:** หาค่าความต้านทานรวม $R_{eq}$ ของวงจรที่มีตัวต้านทาน 4.00 Ω, 7.00 Ω, 10.0 Ω, และ 9.00 Ω ตามลักษณะการเชื่อมต่อที่กำหนด และหากระแสไฟฟ้ารวมในวงจรเมื่อแรงดันไฟฟ้าระหว่างจุ

1. **Problem Statement:** Find the current supplied by a 12V battery in a circuit with resistors arranged between points e, a, b, c, d as described.

1. **Problem Statement:** We have a circuit with three currents $I_1$, $I_2$, and $I_3$, voltage sources 130 V, 120 V, and 20 V, and resistors 2 $\Omega$, 2 $\Omega$, and 4 $\Omega

1. **State the problem:** Find the current through the 8 \(\Omega\) resistor in branch AB using the superposition theorem for the given circuit. 2. **Identify sources:** There are

1. **State the problem:** Given the node voltages $V_A=7$ V and $V_B=2$ V, and the voltage drop across resistor $R$ as $V_R=2$ V, we need to find the resistance value of $R$. 2. **

1. **State the problem**: Find voltages $V_1$, $V_3$, $V_{ab}$ and source current $I_s$ for the circuit with resistors $R_1=5\ \Omega$, $R_2=3\ \Omega$, $R_3=6\ \Omega$, $R_4=2\ \O

1. **State the problem:** Given the currents $I_1=10$ A, $I_2=12$ A, and $I_5=8$ A, find the magnitude and direction of currents $I_3$, $I_4$, $I_6$, and $I_7$ in the diamond-shape

1. The problem asks why the piecewise function for current \(i(t)\) from problem 1.5 does not have the same amplitude signs as some answers given in Appendix D. 2. Given function \

1. **State the problem:** We want to limit the current flowing through a 50 ohm resistor to 10 A when connected to a 600 V power source. We need to find how to connect an auxiliary