Project ForgeHeat Transfer
Convection & Radiation
GATE 2017
Easy
The emissive power of a blackbody is P. If its absolute temperature is doubled, the emissive power becomes
- A2P
- B4P
- C8P
- 16P
Explanation
By the Stefan-Boltzmann law, emissive power E ∝ T⁴. Doubling T multiplies E by 2⁴ = 16, so the new emissive power is 16P.
Source: GATE ME 2017 Session 2 (ME-2) (2017)
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