The battery is built by connecting several unit cells in series. Each unit cell has the voltage V1=1.4 V and the internal resistance Ri = 3.2 Ohm;
1) How many unit cells in series must the battery use to have the open-circuit voltage Vo.c. = 11.2 V?
2) Using the battery as per question 1, what is the power delivered to the load resistance RL=19.5 Ohm connected to the battery (Watts)?