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    3.

    Dimension of electric current is

    A

    [M0L0T1Q]\left[ {{M^0}{L^0}{T^{ - 1}}Q} \right]

    B

    [ML2T1Q]\left[ {M{L^2}{T^{ - 1}}Q} \right]

    C

    [M2LT1Q]\left[ {{M^2}L{T^{ - 1}}Q} \right]

    D

    [M2L2T1Q]\left[ {{M^2}{L^2}{T^{ - 1}}Q} \right]

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    4.

    The unit of Wien’s constant b is

    A

    Wm2K4{\rm{W}}{{\rm{m}}^{ - 2}}{{\rm{K}}^{ - 4}}

    B

    m1K1{{\rm{m}}^{ - 1}}{{\rm{K}}^{ - 1}}

    C

    Wm2{\rm{W}}{{\rm{m}}^2}

    D

    MK

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    7.

    The unit of Stefan’s constant σ\sigma is

    A

    W  m2  K1W\;{m^{ - 2}}\;{K^{ - 1}}

    B

    W    m2  K4W\;\;{m^2}\;{K^{ - 4}}

    C

    W  m2  K4W\;{m^{ - 2}}\;{K^{ - 4}}

    D

    W  m2  K4W\;{m^{ - 2}}\;{K^4}

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    8.

    The SI unit of momentum is

    A

    kgm  \frac{{kg}}{{m\;}}

    B

    kg.msec\frac{{kg.m}}{{{\rm{sec}}}}

    C

    kg.m2sec\frac{{kg.{m^2}}}{{{\rm{sec}}}}

    D

    kgimesnewtonkg imes newton

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