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The unit of thermal conductivity is :...

The unit of thermal conductivity is :

A

`W m^(-1) K^(-1)`

B

`J m K^(-1)`

C

`J m^(-1) K^(-1)`

D

`W m K^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`K= (Qx)/(A(T_(1)-T_(2))t)` where Q is the amount of heat flow x is the thikness of the slab , A is the area of cross section and t is the time taken.
`K= (Jm)/(m^(2)Ks)= W(1)/(m)(1)/(K)= Wm^(-1)K^(-1)`
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