1. The problem statement, all variables and given/known data All the batteries shown are 1 V. What voltage is supplied by the batteries in this circuit? What is the current through the branch of the circuit containing the 20 Ω resistor? What is the current through the branch of the circuit containing the 30 Ω resistor? What is the total current of the circuit? What is the total resistance of the circuit? 2. Relevant equations Voltage (V) = Current (I) / Resistance (R) Ibranch = Vtotal / Rbranch Itotal = Ibranch 1 + Ibranch 2 + ... Rtotal = Vtotal / I total 3. The attempt at a solution The problem is that I can't determine the effect of this arrangement of batteries. If the batteries were replaced with a single battery of, say, 3 V (or a series with this as the total), then the current through the 20 Ω resistor would be .15 A and the current through the 30 Ω resistor would be .1 A, the total current would be .25 A, resulting in the total resistance being 12 Ω. However, with this battery arrangement, I can't determine if it would act as a series circuit with 3V or a parallel circuit with 2V. Additionally, I'm not sure what effect a parallel arrangement would have on the current of the entire circuit.