Question:-
In a large plate the steady temperature distribution is as shown in the given figure. If no heat is generated in the plate, the thermal conductivity ‘k’ will very as (T is temperature and a is a constant)

Option (A)
k0(1+ aT)
Option (B)
k0(1- aT)
Option(C)
k0+ aT
Option(D)
k0 - aT
Correct Option:
(A)
Question Solution:

For positive value of a, the temperature profile curve is convex and curve would be concave for negative value of coefficient a.
\ K = K0 [1+aT]
question-answer-faq-3065