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Units and Dimensions

For a perfect...

Question

For a perfect insulator, coefficient of thermal conductivity is:

A

0

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B

\infty

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C

1

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D

2

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Solution

The correct option is A $0$
An insulator does not conduct heat.
So, $\frac{d Q}{d t} = \frac{K A}{L}$ x temperature gradient $= 0$
So, $K = 0$

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