Question

What is the thermal conductivity of a perfect heat
conductor and a perfect heat insulator?​

Answer 1

Explanation:

The thermal conductivity K is infinity for a perfect heat conductor and it is Zero for a perfect heat insulator.

Answer 2

Answer:

Thermal conductivity :

It is defines as the ability of a solid to conduct heat.

Mathematically :

k = ( Δ  Q / Δ t ) / ( A × Δ T / Δ x )

Now :

Thermal conductivity of a perfect heat conductor is infinity .

i.e. k =  ( Δ  Q / Δ t ) / 0  

k = ∞   [  Δ T = 0 ]

Also thermal conductivity of a perfect heat insulator is zero .

i.e. k = ( Δ  Q / Δ t ) / ( A × Δ T / Δ x )

k = 0 / ( A × Δ T / Δ x )   [ Δ  Q = 0 ]

k = 0 .

Read more :

The temperature of a black body is increased from 200 K  to 400 K. How will the ratio of emission of energy change?​

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