Two bulbs are connected in series but different ratings

Two lamps A and B are rated 60W 220V and 100W 220V respectively


Two Bulbs in Series
























Lamp A by itself has power of P = I x V ; 60=I x 220 ; so I = 60/220 = 0.27 amperes.
Thus the lamp has a resistance V = I x R ; R=220/0.27 = 807 ohms.

Lamp B by itself has a power of P = I x V ; so I = 100/220 = 0.45 amperes.
Thus the lamp has a resistance V=I x R ; R=220/0.45 = 489