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A 220 v, 1000w bulb is connected across a 110 v mains supply. the power consumed will be
Asked by swatipjadhav7 | 01 Sep, 2020, 11:01: AM
answered-by-expert Expert Answer
Rating of the electric bulb is given as, 
Vrating =  220 V 
Prating =  1000 W  
R= V2 rating /Prating =  220 2 / 1000= 48.4 Ω
When this bulb of resistance  48.4 Ω is connected to 110 V main supply, 
the power consumed is, 
P = V2 /R = 1102 / 48.4  = 250 W
Answered by Shiwani Sawant | 01 Sep, 2020, 11:29: AM

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