Heat TransferMedium
Question
A blackened metallic foil kept at a distance d from a spherical heater. The power absorbed by the foil is P. If the temperature of heater and distance both are doubled, then the power absorbed by the foil will be :-
Options
A.8 P
B.4 P
C.2 P
D.P
More Heat Transfer Questions
Radius of two spheres of same material are 1 & 4 m respectively and their temp. are 4 × 103 and 2 × 103 K resp...The temperature of a perfect black body is 727oC and its area is 0.1 m2. If stefan′s constant is 5.67 × 10-8 ...A black body has maximum wavelength λm at 2000 K. Its corresponding wavelength at 3000 K is:...There is a black spot on a body. If the body is heated and carried in a dark room then it glows more. This can be explai...A cup of tea cools from 80oC to 60oC in one minute. The ambient temperature is 30oC. In cooling from 60oC to 50oC. It wi...