NEET Physics Mathematical Tools, Units & Dimensions NEET PYQ-Mathematical Tools, Units and Dimensions

  • question_answer
    The unit of thermal conductivity is: [NEET 2019]

    A) \[W\text{ }m\text{ }{{K}^{1}}\]

    B) (b)\[~W\text{ }{{m}^{1}}\text{ }{{K}^{1}}\]

    C) \[J\text{ }m\text{ }{{K}^{b\text{ }1}}\]

    D) \[J\text{ }{{m}^{1}}\text{ }{{K}^{1}}\]

    Correct Answer: B

    Solution :

    [b] \[H=\frac{kA}{\ell }({{\theta }_{1}}-{{\theta }_{2}})\]
                    \[k=\frac{H\ell }{A\theta }\]
                    \[=\frac{W.m}{{{m}^{2}}K}\]
                    \[=W{{m}^{1}}{{K}^{1}}\]


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