1.

three bulbs of rating 40 w, 60 w, and 100w, are desinged to work on 220 v mains . which bulb will glow most bright if they are connected in series across 220v mains

Answer»

By applying the FORMULA, P=VI
 P ∝ I
i.e, more is the power, the more is the current.

Since,the 100 W bulb has the MAXIMUM power,it will have the maximum current and thus the 100 W bulb will GLOW most brightly.



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