Question

an electric bulb is rated at 220v and 100w.what is the power consumed

Answer 1

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Bulb is rated as 220v and 100w.
P°=100w
V=220v
So,resistance equals to,
P=V²/R
R=V²/P=220×220/100=484Ω
So,power consumed=V²/R=220×220÷484=100w

Answer 2

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It measures the work done n

per unit charger.

It is defined as the difference in

electric potential between two points in an electric field,equal to the work

done per unit quantity of charge in moving it from one point to another

in an electrostatic field