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VIT Engineering VIT Engineering Solved Paper-2008

  • question_answer
    A sample of \[\text{HCl}\] gas is placed in an electric field of \[3\times {{10}^{4}}\text{N}{{\text{C}}^{\text{-1}}}\]. The dipole moment of each\[\text{HCl}\]molecule is \[6\times {{10}^{-30}}\text{Cm}\]. The maximum torque that can act on a molecule is

    A)  \[2\times {{10}^{-34}}{{\text{C}}^{\text{2}}}\text{m}{{\text{N}}^{\text{-1}}}\]

    B)  \[2\times {{10}^{-34}}\text{Nm}\]

    C)  \[18\times {{10}^{-34}}\text{Nm}\]

    D)  \[0.5\times {{10}^{34}}{{\text{C}}^{\text{-2}}}\text{N}{{\text{m}}^{\text{-1}}}\]  

    Correct Answer: C

    Solution :

    Torque, \[\tau =p\times E\] \[{{\tau }_{\max }}=pE\] \[=6\times {{10}^{-30}}\times 3\times {{10}^{4}}\] \[=18\times {{10}^{-26}}Nm\]


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