1. The problem statement, all variables and given/known data A battery has an emf of 24 V and an internal resistance of 0.25 ohm is being charged at a rate of 24 A. What is the voltage required to do this? 2. Relevant equations V(terminal) = emf +/- Ir 3. The attempt at a solution Since the battery is getting charged that means we use the V= emf + Ir V = 24 + (24)(0.25) = 30V Is this correct?