Heat TransferHard
Question
The rectangular surface of area 8cm × 4 cm of a black body at a temperature of 127oC emits energy at the rate of E per second. If the length and breadth of the surface are each reduced to half of the initial value and the temperature is raised to 327oC, the rate of emission of energy will become.
Options
A.
E
EB.
E
EC.
E
ED.
E
EMore Heat Transfer Questions
2 gms steam at 100o C is mixed with 5 gm ice at - 40oC in an ideal calorimeter. The final temperature of the system will...The lengths and radii of two rods made of same material are in the ratios 1 : 2 and 2 : 3 respectively. If the temperatu...By cooling two liquids of equal volume from temp. 60 oC to 50 oC in same conditions time required are 324 and 810 sec.re...Two indentical rods of copper and iron are coated with wax uniformly. When one end is kept at temperature of boiling wat...The υm − T curve for a perfect black body is −...