(A) 40 W bulb ()
(B) 60 W blub (X)
(C) 100 W blub (X)
(D) all will burn equally brightly (X)
Answers: Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains 40 W bulb.