why does the temp of every part of metallic rod become constant in steady state
Answers
(2) Steady state : After sometime, a state is reached when the temperature of every cross-section of the rod becomes constant. In this state, no heat is absorbed by the rod. ... The direction of flow of heat through a conductor at any point is perpendicular to the isothermal surface passing through that point.
Explanation:
In a conducting rod the rate of flow of heat
H' is dependent on its cross sectional area 'A
length of the rod 'I and temperature
gradient, 'dT/dx.Here dT is the temperature
difference across the length 'dx' of the rod in
the direction of heat flow.If 'K' is thermal
conductivity of the material of the rod, then
H-KA(AT/dx)
In steady state rate of flow of heat 'Is
constant, thermal conductivity of the rod
material K Is constant and 'A' the cross
sectional area is also constant. This leads us
that the temperature gradient (dT/dx) is
consonant le
dT/dx-constant-(-m) (say)