nayd1
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You leave a light on in your house for 10 minutes (600 seconds). The lightbulb draws 0.5 amps at 120 volts. What is the power rating of the lightbulb and how much energy is consumed in the 10 minutes?
A) 60 watts and 0.1 joules
B) 60 watts and 36,000 joules
C) 240 watts and 0.4 joules
D) 2400 watts and 144,00 joules

Respuesta :

> What is the power rating?

The power rating can actually be calculated by the product of current and volts. Therefore:

Power = I V

Given that current I = 0.5 A and V = 120 volts, therefore:

Power = (0.5 A) (120 V)

Power = 60 Watts

 

> How much energy is consumed in 10 minutes

Energy is simply the product of power and time in seconds, therefore:

Energy = Power * time

Energy = 60 Watts * (600 seconds)

Energy = 36,000 Joules


B

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