Extended surface are used to increase the rate of heat transfer. When the convective heat transfer coefficient h=mk, the addition of extended surface will:

Increase the rate of heat transfer when the length of the fin is very large

Decrease the rate of heat transfer

Not increase the rate of heat transfer

Increase the rate of heat transfer when the length of the fin is very large

Extended surface are used to increase the rate of heat transfer. When

1.	Extended surface are used to increase the rate of heat transfer. When the convective heat transfer coefficient h=mk, the addition of extended surface will:
A.	Increase the rate of heat transfer
B.	Decrease the rate of heat transfer
C.	Not increase the rate of heat transfer
D.	Increase the rate of heat transfer when the length of the fin is very large
Answer» D. Increase the rate of heat transfer when the length of the fin is very large