Final answer:
To calculate the current in the given circuit, divide the total voltage by the total resistance.
Step-by-step explanation:
To calculate the current in the given circuit, we can use Kirchhoff's rules. Let's assume the resistance R is 9 Ω. First, let's find the total voltage across the resistors R1, R2, and R3 using Ohm's law: V = I * R. Since R1 = R2 = R3 = 50 Ω, the total resistance is 150 Ω. Therefore, the total voltage is 6 V. To find the current Io, we can divide the total voltage by the total resistance: Io = V / R = 6 V / 150 Ω = 0.04 A.