Question:-
A large spherical enclosure has a small opening. The rate of emission of radioactive flux through this opening is 7.35 kW/m2 The temperature at the inner surface of the sphere will be about (assume Stefan Boltzman constant)
s = 5.67 x 10-8 W/m2K4
Option (A)
600°C
Option (B)
330°C
Option(C)
873 K
Option(D)
1000 K
Correct Option:
(B)
Question Solution:
Q1 = sT4 = heat low
7.35 x 103 = 5.67 x 10-8 T4
[(7.35 x 103)/(5.67 x 10-8)]1/4 = T
T = 600K = 327°C
question-answer-faq-6051