Heat TransferMedium
Question
There is a small hole in a container. At temperature should it be maintained in order that it emits one calorie of energy per second per meter2 :-
Options
A.10 K
B.500K
C.200 K
D.100 K
Solution
From Stefan′s law 
⇒ ᐃQ = σAT4 ⇒
= 5.67 × 10-8 × 1× T4 ⇒ T = 100 K
⇒ ᐃQ = σAT4 ⇒
Create a free account to view solution
View Solution FreeMore Heat Transfer Questions
Two Plates of equal areas are placed in contact with each other. their thickness are 2 and 3 respectively. Temp of exter...The figure shows a system of two concentric spheres of radii r1 and r2 and kept at temperatures T1 and T2 respectively. ...A black body at 200 K is found of exit maximum energy at a wavelength 14 mm. When its temperature is raised to 1000 K, t...A solid cube and sphere are made of same substance and both have same surface area. If the temperature of both bodies 12...Two metallic spheres S1 and S2 are made of the same material and have got identical surface finish. The mass of S1 is th...