Heat and Thermal ExpansionHard

Question

A point source of heat of power P is placed at the center of a spherical shell of mean radius R the material of the shell has thermal conductivity k. If the temperature difference between the outer and the inner surface of the shell is not to exceed T, Then the thickness of the shell should not b less than : -

Options

A.
B.
C.
D.

Solution

For sphere kA = P
⇒ k (- dT) =
⇒ KT = >⇒ t = (r2 - r1) = 4πR2

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

The specific heats of a gas are CP = 0.2 cal / g oC & CV = 0.15 cal / g oC .[Take R = 2 cal / mol oC]...A system S receives heat continuously from an electrical heater of water 10W. The temperature of S becomes constant at 5...N(< 100) Molecules of a gas have velocities 1, 2, 3.........N , km/s respectively . Then :-...One mole of an ideal gas undergoes P = Here P0 and V0 constant. Change in temperature of the gas when volume is changed ...When water is boiled at 2 atm pressure, the letant heat of vaprization is 2. × 106 J/ kg and the boiling point is 1...