Question

Three rods of identical geometry but different materials are welded

Answer 1

Answer:

hey here is your answer

(a).Let’s redraw the diagram

w10.png

Since all rods are connected in series,

Req = RAl + RCu + RAl

Given -

Temperature of the hot end ,T1 = 100°C

cold end ,T2 = 0°C

Substitution for Req –

Req =

Given Thermal conductivities of aluminium =200 W m–1 °C–1

Copper = 400 W m–1 °C–1

Therefore

Req =

+

+

) =

Now rate of flow of heat,

=

=

(1)

Given rate of flow of heat

From (1)

40 = 80 × 100 ×

hope it help you