- If the branch current method is used, which equation describes loop 1? A) 0 = -5 V - 3 Ω)I₁ + 7 Ω)I₂ B) 0 = +5 V - 3 Ω)I₁ + 7 Ω)I₂ C) 0 = +5 V + 3 Ω)I₁ - 7 Ω)I₂ D) 0 = -5 V - 3 Ω)I₁ - 7 Ω)I₂

Question

Quizplus · Accepted Answer

Kirchhoff's voltage law states that the sum of the voltages around a loop is zero. In loop 1, the voltage drop across the 3 Ω resistor is -3 Ω)I₁, the voltage drop across the 7 Ω resistor is 7 Ω)I₂, and the voltage source is +5 V. Therefore, the equation for loop 1 is 0 = +5 V - 3 Ω)I₁ + 7 Ω)I₂.

- If the Branch Current Method Is Used, Which Equation