A copper rod (initially at room temperature 20°C) of non-uniform cross section is placed between a steam chamber at 100°C and ice-water chamber at 0°C
(a) | Initially rate of heat flow will be | (p) | maximum at section A |
(b) | At steady state rate of heat flow will be | (q) | maximum at section B |
(c) | At steady state temperature gradient will be | (r) | minimum at section A |
(d) | At steady state rate of change of temperature at a certain point will be | (s) | minimum at section B |
(t) | same for all section |
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
p, s t q, r t
Sol. Initially more heat will enter through section A due to temperature difference and no heat will flow through section B because initially there is no temperature difference.
At steady state rate of heat flow 
is same for all sections
At steady state 
= kA 
or 
= 
is inversely proportional to area of cross-section. Hence is maximum at B and minimum at A At steady state heat accumulation = 0
So 
= 0 for any section.
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