1. The problem statement, all variables and given/known data I need to calculate EMF and internal resistance from the given resistance and voltage. R = 3 ohms U = 3,6 V EMF- ? I0 - ? r - ? 2. Relevant equations I = U/R EMF = A/q I = EMF/R+r I0 = EMF/r 3. The attempt at a solution I = 3,6/3 = 1,2 A I = EMF/R+r 1,2= EMF/3+r ^ I hit a wall there, don't know whether to consider EMF to be the same as Voltage or not. Help please.