Q8: Consider the two circuits shown in Figure P28.8 in which the batteries are identical. The resistance of each lightbulb is R. Neglect the internal resistances of the batteries.
(a) Find expressions for the currents in each lightbulb.
(b) How does the brightness of B com- pare with that of C? Explain.
(c) How does the bright- ness of A compare with that of B and of C? Explain.