Analyzing a real battery. The battery in Figure P19.58 is a real battery. That is, it ha...

Analyzing a real battery. The battery in Figure P19.58 is a real battery. That is, it has some internal resistance in series with an ideal battery with an emf of In an attempt to determine a resistor is first placed across points A and B, and the voltage across the resistor is measured to be 6.5 V. This resistor is then replaced with a second resistor with and the voltage across is found to be 9.5 V. Find