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The unit of t...

Question

The unit of the coefficient of thermal conductivity is____.

$^{\circ} C^{- 1}$

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$J M^{- 1} S^{- 1} K^{- 1}$

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$S^{- 1}^{\circ} C^{- 1}$

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$m s^{- 1}$

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Solution

The correct option is B
$J M^{- 1} S^{- 1} K^{- 1}$

Thermal conductivity is the property of a material to conduct heat.

Formula for Thermal conductivity is

$Q = K A (\frac{θ_{1} - θ_{2}}{x}) t \Rightarrow K = \frac{Q x}{A (θ_{1} - θ_{2}) t}$
Where, K= Coefficient of thermal conductivity
Q= Amount of heat flowing normally through the faces.
$(θ_{1} - θ_{2})$ = Temperature difference
t= time of flow
A= Area of the face

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