A battery has emf 25.0 V and internal resistance r. A 9.00 ? resistor is connected to the terminals of the battery, and the voltage drop across the resistor is 23.0 V. Part A What is the internal resistance of the battery? Express your answer with the appropriate units.
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0\) V, \(R_{internal} = R\), and \(R_{external} = 9.00\) ohms, we have: \[I = \frac{25.0}{R + 9.00}\] Show more…
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