P. 4127. A battery of electromotive force 6 V and of internal resistance 8 and a rechargeable battery of e.m.f. 6 V and of negligible internal resistance are connected in series.
a) What is the resistance of the resistor which is to be connected to the system in order to measure a voltage of 6 V across it?
b) What is the terminal voltage across the battery in this case?