Analyzing a real battery. The battery in Figure P19.58 is a real battery. That is, it has some internal resistance R_int in series with an ideal battery with an emf of V0. In an attempt to determine R_int and V₀, a resistor R₁ = 750Ω 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 R₂ = 2500 Ω, and the voltage across R₂ is found to be 9.5 V. Find R_int and V₀.

 

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R1 or R2 A Real battery 1. Figure P19.58