1. The problem statement, all variables and given/known data When a nonideal battery is connected to a 3.0-Ω resistor in a circuit, the current in the circuit is 2.0A . When the same battery is connected to a 1.0-Ω resistor in a circuit, the current in the circuit is 3.0 A. What is the internal resistance of the battery? What is the emf of the battery? 2. Relevant equations I=ε/(Rbattery+R) I=ε/R 3. The attempt at a solution I've looked at this to solve the emf for each individual situation, which gives me for the first scenario 2.0=ε/3.0 ε=6.0 2nd scenario 3.0=ε/1.0 ε=3.0 I realized that plugging this in wouldn't work because this requires me to have two different EMFs when it only wants one. However using it I get for first scenario 2.0=6.0/(rbattery + 3.0), = rbattery + 3.0 = 3.0, = r battery = 0 second scenario 3.0 = 3.0 /(rbattery + 1.0), = r battery + 1 = 1, = r battery = 0 Considering the equation has to unknowns that I need to find out figuring out how to nail one of the variables down would help solve this.