The battery in Figure P31.95 has internal resistance (R_{text {batt }}=13.0 Omega) and maintains an emf (mathscr{E}=20.0

Question:

The battery in Figure P31.95 has internal resistance $R_{\text {batt }}=13.0 \Omega$ and maintains an emf $\mathscr{E}=20.0 \mathrm{~V}$. What is the resistance $R$ of the resistor connected in series with the battery if the current through the circuit is $0.100 \mathrm{~A}$ ?

Data from Figure P31.95

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