1. The problem statement, all variables and given/known data What would the electric field lines / equipotential lines look like between point charges that are set up with potentials of 20 volts and 30 volts versus point charges that are set up with potentials of 0 volts and 10 volts? 3. The attempt at a solution At first I thought the electric field lines would look different, but the more I thought about it, the more it seemed like they would be the same, since only the difference in V counts as opposed to the "absolute" values of V. Is this correct? Thank you all so much! Added question: I completely forgot about this, but would the lines extend from the 10 V charge toward the 0 V? I know the lines go from the positive charge from the negative charge, so I'm pretty sure they would go from the higher V to the lower V, but I just wanted to make sure. Thank you!