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    5.

    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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    6.

    Dimensions of strain are

    A

    MLT1ML{T^{ - 1}}

    B

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

    C

    MLT2ML{T^{ - 2}}

    D

    M0L0T0{M^0}{L^0}{T^0}

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    7.

    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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