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8 Oct 2008 12:04:10 IST

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a bulb rated 220v,60wis connected to 200 v supply.how to calculate power consumed by bulb?

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a bulb rated 220v,60wis connected to 200 v supply.how to calculate power consumed by bulb?

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harsh

Scorching goIITian

Joined: 3 May 2008

Posts: 288

8 Oct 2008 15:18:38 IST

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see ...in first case P & V is given so take out the resistance of the bulb usng the formula P = V^2 / R ..............NW IN THE 2ND CASE V IS GIVEN (200 ) ND R WE HAV TAKEN OUT .... SO NW TAKE OUT THE P CONSUMD BY THE BULB USNG THE FORMULA V^2/ R.........

RATE IF USEFUL...CORRECT IF WRONG...

Amit

Cool goIITian

Joined: 2 Sep 2008

Posts: 69

8 Oct 2008 23:48:52 IST

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P=VI ; I=3/11

R=V/I

R=220*11/3....................................................1

NOW,

V=200V

R=220*11/3 [FROM 1 ]

I=V/R

I=200*3/220*11

NOW;

P=VI

P=200*200*3/220*11

PLEASE RATE ME!

IF MY ANSWER IS USEFUL!

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