Physics 2 Quiz
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A student measures the terminal voltage of a battery with internal resistance r=2 Ωr = 2\text{ }\Omega and EMF E=10 V\mathcal{E} = 10\text{ V} while the battery is connected to an external resistor RextR_{ext}. The terminal voltage is measured as 8 V.
Using KVL, the student wants to determine RextR_{ext}. Which of the following correctly applies KVL to find RextR_{ext}, and correctly identifies what the terminal voltage represents in the KVL equation?
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