Ten bulbs in parallel are supplied by a 7,200/120-V transformer as shown in Fig. 13.147, w...

Ten bulbs in parallel are supplied by a 7,200/120-V transformer as shown in Fig. 13.147, where the bulbs are modeled by the 144-Ω resistors. Find:

(a)                         the turns ratio n,

(b)                        the current through the primary winding.