The current in the figure below is 0.53 A. (Let the internal resistance of battery 1 be r1 = 1.4 Ω and the internal resistance of battery 2 be r2 = 1.3 Ω.)
(a) Find the voltage drop Vab.
(b) Find the power dissipated in R.
(c) Find the useful electric power supplied by battery 2. (Note: Do not forget the internal resistance of battery 2.)
(d) Find the rate at which chemical energy is stored in battery 1. (Note: Do not include power dissipated in the internal resistor of battery 1 in your answer.)
