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    81.

    The dimensional formula for Boltzmann’s constant is

    A

    [ML2T2heta1]\left[ {M{L^2}{T^{ - 2}}{heta ^{ - 1}}} \right]

    B

    [ML2T2]\left[ {M{L^2}{T^{ - 2}}} \right]

    C

    [ML0T2heta1]\left[ {M{L^0}{T^{ - 2}}{heta ^{ - 1}}} \right]

    D

    [ML2T1heta1]\left[ {M{L^{ - 2}}{T^{ - 1}}{heta ^{ - 1}}} \right]

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    83.

    Dimension of R is

    A

    ML2T1M{L^2}{T^{ - 1}}

    B

    ML2T3A2M{L^2}{T^{ - 3}}{A^{ - 2}}

    C

    ML1T2M{L^{ - 1}}{T^{ - 2}}

    D

    None of these

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    86.

    Dimensional formula for force is

    A

    [ML2T2]\left[ {{\rm{M}}{{\rm{L}}^2}{{\rm{T}}^{ - 2}}} \right]

    B

    [MLT2]\left[ {{\rm{ML}}{{\rm{T}}^{ - 2}}} \right]

    C

    [ML1T2]\left[ {{\rm{M}}{{\rm{L}}^{ - 1}}{{\rm{T}}^{ - 2}}} \right]

    D

    [ML2T2]\left[ {{\rm{M}}{{\rm{L}}^2}{{\rm{T}}^{ - 2}}} \right]

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    87.

    The dimensions of electric dipole moment are

    A

    [L2I]\left[ {{{\rm{L}}^2}{\rm{I}}} \right]

    B

    [LI]\left[ {{\rm{LI}}} \right]

    C

    [LTI]\left[ {{\rm{LTI}}} \right]

    D

    [T2]\left[ {{{\rm{T}}^{ - 2}}} \right]

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    89.

    Frequency is the function of density (ρ) , length (a) and surface tension (T). Then its value is

    A

    kT/ρ1/2a3/2k\sqrt T /{\rho ^{1/2}}{a^{3/2}}

    B

    kρ3/2a3/2/Tk{\rho ^{3/2}}{a^{3/2}}/\sqrt T

    C

    kρ1/2a3/2/T3/4k{\rho ^{1/2}}{a^{3/2}}/{T^{3/4}}

    D

    None of these

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