Heat and Thermal ExpansionHard

Question

The area of cross-section of rod is given by A = A0 where A0 & constant and x is the distance from one end. If thermal conductivity of the material is K, what is the thermal resistance of the rod if its length is l0?

Options

A.KA0αl (1 + αl0)
B. l (1 + αl0)
C.N l (1 + αl0)
D.N l (1 + αl0)

Solution

dRH =
RH =dRH =
= ln(1 + αl0)
OR
Check dimensionally

Create a free account to view solution

View Solution Free
Topic: Heat and Thermal Expansion·Practice all Heat and Thermal Expansion questions

More Heat and Thermal Expansion Questions

A inert gas obeys the law PVx = constant. For what value of x, it has negative molar specific heat -...Two fine steel wires fastened between the projections of a heavy brass bar,are just taut when the whole system is at 0oC...A steel scale measure the length of a copper rod as l0 when both are at 20oC, which is the calibration temperature for t...Air is filled at 60oC in s vessel of open mouth. The vessel is heat to a temperature T so that part of air escapes. The ...In a process the density of a mass remains constant, If the temprature is doubled , then the change in the pressure will...