J & K CET Medical J & K - CET Medical Solved Paper-2015

  • question_answer
    Dimensions of Plancks constant are

    A)  \[[M{{L}^{2}}{{T}^{-1}}]\]

    B)  \[[M{{L}^{2}}{{T}^{-3}}]\]

    C)  \[[ML{{T}^{-1}}]\]

    D)  \[[M{{L}^{3}}{{T}^{-3}}]\]

    Correct Answer: A

    Solution :

     Energy (E) =Plancks constant (h)\[\times \]Frequency(v) \[\Rightarrow \] \[E=hv\]\[\Rightarrow \]\[[E]=[h][v]\] \[\Rightarrow \] \[[M{{L}^{2}}{{T}^{-2}}]=[h]\left[ \frac{1}{T} \right]\] \[\Rightarrow \] \[[h]=[M{{L}^{2}}{{T}^{-1}}]\] \[\therefore \] Dimension of\[h=[h]=[M{{L}^{2}}{{T}^{-1}}]\]


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