A 220V, 1000W bulb is connected across a 110V mains supply. The power consumed will be............. options are 1)1000W 2)750W 3)500W 4)250W
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the answer should be 250w.
p=v^2/R
R=200×200/1000
=48.4ohm
now p=v^2/R
=110×110/4.8=250watt
p=v^2/R
R=200×200/1000
=48.4ohm
now p=v^2/R
=110×110/4.8=250watt
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