Question

A copper bar 2m long has a circular cross section of radius 1 cm. One end is kept at 100°C and the
other at 0°C. It is assumed that negligible heat is lost through the surface. (a) The thermal resistance
of the bar is (b) The temperature gradient is (c) The temperature at 25 cm from the hot end will be
(K = 400 SI units)
1) 159 K/w, 50 K/m, 8.75°C
2) 15.9 K/W, 50 K/m, 87.5°C
3) 1.59 K/W, 500 K/m, 8.75°C
4) 159 K/W, 5 K/m, 8.750°C​

Answer 1

Answer:

One end is kept at 100∘C and the other at 0∘C. The surface is insulated so that negligible heat is lost through the surface.

Answer 2

Answer:

2) 15.9 K/W , 50 K/M , 87.5⁰C