UPSEE Solved Model Paper 7

The rate of flow of heat in a conductor is

dQ

dt

= KA

dθ

dx

⇒ K =

( dQ dt )

(A dθ dx )

where. K is coefficient of thermal conductivity.
SI units of power (

dQ

dt

) , temperature (θ) , area (A) and distance (x) are W , K, m2 and m. Thus,
SI unit of K =

W

m2× K m

= W/m - K
Hence, option 'A' is correct