A CFL bulb has an efficiency of 8.9% and a power of 22 W. How much light energy does the lightbulb produce in 1 second

Question

Gloria Avery

Physics

12 October, 00:03

A CFL bulb has an efficiency of 8.9% and a power of 22 W. How much light energy does the lightbulb produce in 1 second

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Answers (1)

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Schmidt · Answer 1

The power that the light is able to utilize out of the supply is only 0.089 of the given.

Power utilized = (0.089) (22 W)

= 1.958 W

= 1.958 J/s

The energy required in this item is the product of the power utilized and the time. That is,

Energy = (1.958 J/s) (1 s) = 1.958 J

Thus, the light energy that the bulb is able to produce is approximately 1.958 J.