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Asked: 2021-02-07T11:52:44+00:00 In:

A body at a temperature of 728°C and having surface area 5 cm2, radiates 300 J of energy each minute. The emissivity is [Given Boltzmann constant : =5.67×10–8 Wm–2 K–4]

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Poll Results

6.67%(a) e = 0.18 ( 1 voter )
0%(b) e = 0.02
0%(c) e = 0.2
93.33% (d) e = 0.15 ( 14 voters )
Based On 15 Votes

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    1 Answer

    1. (d) e = 0.15

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