The Filament Temperature of a Light Bulb Is 2,000 K

question 64

Multiple Choice

The filament temperature of a light bulb is 2,000 K when the bulb delivers 40 W of power.If its emissivity remains constant,what power is delivered when the filament temperature is 2,400 K?
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• A) 166 W
• B) 125 W
• C) 83 W
• D) 62 W
• E) ​42 W

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