A battery with emf, ε = 15 V, has a terminal voltage of 12.8 V when it is delivering 18.5 W of power to a circuit resistor with unknown resistance, R. (a) Find the resistance of the unknown resistor. ΙΩ R = (b) What is the internal resistance of the battery? Ω r=

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A battery with emf, & = 15 V, has a terminal voltage of 12.8 V when it is
delivering 18.5 W of power to a circuit resistor with unknown resistance, R.
(a) Find the resistance of the unknown resistor.
R =
Ω
(b) What is the internal resistance of the battery?
Ω
r =
Transcribed Image Text:A battery with emf, & = 15 V, has a terminal voltage of 12.8 V when it is delivering 18.5 W of power to a circuit resistor with unknown resistance, R. (a) Find the resistance of the unknown resistor. R = Ω (b) What is the internal resistance of the battery? Ω r =
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