- Homework Statement:
- For the circuit below, calculate the potential difference between points a and b. The current in the 2.00 Ω resistor is 0.909 A, and the current in the 4.00 Ω resistor is 1.636 A.
- Relevant Equations:
The solution chooses the centre wire to determine the potential difference, where Va−(0.909 A)(2.00 Ω)=Vb and Vb - Va = -1.82
If I choose the top wire (passing through the 12 V battery and 4 Ω resistor), Va - 12 + (1.636 A)(4.00 Ω)=Vb, and Vb - Va is different (= -5.46 V). Why would this path not work?