Find an expression for the heat transferred through a rectangular slab of area
of cross-section A, thickness d in time t. Its two faces are maintained at
temperatures Th and Tc (Th > Tc ) respectively. An electron and photon each have a wavelength 1.00 find the energy of photon and electron.

1

Answers

2015-04-01T15:11:30+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Thickness = d
Area of cross section = A
time = t
Let the conductivity = k
The two faces are at temperatures Th and Tc(Th>Tc).

So the heat flow rate is given as

q=kA\  \frac{\Delta T}{d} \\ \\ \Rightarrow q=kA\  \frac{T_h-T_c}{d} \\ \\ \Rightarrow q= \frac{kA(T_h-T_c)}{d}\ W

Heat transferred =Q

Q = qt=\frac{kA(T_h-T_c)}{d} \times t=\frac{kAt(T_h-T_c)}{d}\ Joule
1 5 1