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NEET Sample Paper NEET Sample Test Paper-74

  • question_answer
    If the dimension of a physical quantity is given by \[{{M}^{a}}{{L}^{b}}{{T}^{c}}\], then the physical quantity will be

    A)  acceleration, if \[\operatorname{a} = 1,\,\,b = -1,\, c = - 2\]

    B)  velocity, if \[\operatorname{a} = 1,\,\,b = 0,\, c = -1\]

    C)  pressure, if \[\operatorname{a} = 1,\,\,b = -1,\, c = -2\]

    D)  force, if \[\operatorname{a} = 0,\,\,b = -1,\, c = -2\]

    Correct Answer: C

    Solution :

    \[Pressure\,\,=\,\,\frac{Force}{Area}\] \[p=\frac{F}{A}=\frac{m\cdot a}{A}\] \[=\,\,\,\,\frac{\left[ ML{{T}^{\,-\,2}} \right]}{\left[ {{L}^{2}} \right]}=\left[ M{{L}^{-1}}{{T}^{-2}} \right]\] \[a=1,\,\,b\,\,=-1,\,\,c=-\,2\]


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