The Filament Temperature of a Light Bulb Is 2000 K

question 44

Multiple Choice

The filament temperature of a light bulb is 2000 K when the bulb delivers 50 W of power.If its emissivity remains constant,what power is delivered when the filament temperature is 2500 K?

• A) 122 W
• B) 62 W
• C) 98 W
• D) 50 W

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