1.

e power A electric bulb is rated 220 V and 100 W. What is the power consumed when it iserated on 10 V?efin

Answer»

Electrical power is the rate at which electrical energy is converted to another form, such as motion, heat, or an electromagnetic field.

The common symbol for power is the uppercase letter P.

When expressed in watts, power is sometimes called wattage

R = 2202/100 Ω =484 Ω. This is the resistance of the bulb.

P = V2/R If V = 220 V we have100 W = 2202/RR = 2202/100Ω = 484Ω. This is the resistance of the bulb.When V = 110 V, power consumed =V2/R = 1102/484 = 25 W.



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