Transmission Of Heat Question 283

Question: The quantity of heat which crosses unit area of a metal plate during conduction depends upon

Options:

A) The density of the metal

B) The temperature gradient perpendicular to the area

C) The temperature to which the metal is heated

D) The area of the metal plate

Show Answer

Answer:

Correct Answer: B

Solution:

$ \frac{dQ}{dt}=KA\frac{d\theta }{dl} $

$ \Rightarrow $ $ \frac{dQ}{dt}\propto \frac{d\theta }{dl} $ (Temperature gradient)