Assuming a Filament in a 100 W Light Bulb Acts

question 12

Multiple Choice

Assuming a filament in a 100 W light bulb acts like a perfect blackbody,what is the temperature of the hottest portion of the filament if it has a surface area of 6.3 × 10^-⁵ m²? The Stefan-Boltzmann constant is 5.67 × 10^-⁸ W/(m² · K²) .

• A)130 K
• B)1100 K
• C)2300 K
• D)5800 K
• E)30 000 K

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