Thursday, January 8, 2015

A 230 V supply is connected across series combination of two bulbs of 60W and 100W respectively.which bulb will glow bright and why ?


A 230 V supply is connected across series combination of two bulbs of 60W and 100W respectively.which bulb will glow bright and why ?




we know in series connection the current is same and voltage is different which depends on resistance of the individual elements connected.

P=V^2/ R, to maintain this relationship the resistance of 60W bulb is greater and voltage across 60 W bulb is more(V=IR).so 60W bulb will glow brighter than 100W bulb.

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