QJEEM20Phbcde: JEE Main 2020 Physics - Class 11 JEEM20Phbcde Solution: Dimensional formula for thermal conductivity is (here K denotes …

Question

Verified Solution • 2025–26 Session moderate

Dimensional formula for thermal conductivity is (here K denotes the temperature):

Accepted Answer

\therefore

{{d\theta } \over {dt}} = kA{{dT} \over {dx}}

\Rightarrow

k =

{{\left( {{{d\theta } \over {dt}}} \right)} \over {A\left( {{{dT} \over {dx}}} \right)}}

\Rightarrow

[k] =

{{\left[ {M{L^2}{T^{ - 3}}} \right]} \over {\left[ {{L^2}} \right]\left[ {K{L^{ - 1}}} \right]}}

= [MLT^–3K^–1]

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