Question

31.
Two rods of copper and brass having the same length
and cross-section are joined end to end. The free end
of the copper rod is at 0°C and of the brass rod is at
100°C in steady state. If thermal conductivity of copper
is 4 times of that of brass, find the temperature at the
junction of two rods.
(1) 80°C (2) 60°C (3) 40°C (4) 20°C​

Answer 1

Answer:

use the formula

kA/l(100-thetha) =4(kA/l)(thetha -0)

(100-thetha) =4(thetha )

100-5theta =0

thetha =20 degree Celsius OK friend this is urs answer