Heat TransferHard
Question
Two spheres of radii in the ratio 1 : 2 and densities in the ratio 2 : 1 and of same specific heat, are heated to same temperature and left in the same surrounding. Their rate of falling temperature will be in the ratio :
Options
A.2 : 1
B.1 : 1
C.1 : 2
D.1 : 4
More Heat Transfer Questions
Two electric lamps A and B radiate the same power. Their filaments have the same dimensions and have emissivities eA and...One end of a thermally insulated rod is kept at a temperature T1 and the other at T2. The rod is composed of two section...A body cools from 60oC to 50oC in 10 minutes. If the room temperature is 25oC and assuming Newotn′s cooling law ho...The thermal capacities of two bodies are in the ratio of 1:4. If the rates of loss of heat are equal for the two bodies ...The rate of emission of electro-magnetic energy by any body does not depend on:...