17. -12 points SerPSE9 28.P.001.MI. A battery has an emf of 15.0 V. The terminal voltage of the battery is 13.0 V when it is delivering 14.0 W of power to an external load resistor R. (a) What is the value of R? Ω (b) What is the internal resistance of the battery? Ω Need Help? Read It Master It