Physics

Problem

A filament with a fixed surface area radiates

40\,\text{W}

of power when operated at

2000\,\text{K}

. Approximately what temperature should an identical filament reach if it is to radiate

160\,\text{W}

? a)

4000\,\text{K}

2800\,\text{K}

2400\,\text{K}

3200\,\text{K}