1. The problem statement, all variables and given/known data Assume the electric potential is zero at the negative terminal of the battery. Calculate: a). the equivalent resistance of the circuit b). the electric potential at position a c). the magnitude and direction of the current through each resistor 2. Relevant equations 3. The attempt at a solution a). I said that the whole equivalent resistance of the circuit is 3000[itex]\Omega[/itex]. I combined the two on the right in series, then the 1200 with that in parallel. Then I added 1500 and 900 to that and got 3000. b). Since the source voltage is 30V and the equivalent resistance is 3000[itex]\Omega[/itex], then the current is 30/3000=0.01 A. So then I said that the voltage at point a is 0.01A*900[itex]\Omega[/itex]= 9V c). I wasn't sure how to go about this one.. Does this use Kirchoff's law?