Related Questions

    2.

    Which of the following is dimensionally correct

    A

    Pressure = Energy per unit area

    B

    Pressure = Energy per unit volume

    C

    Pressure = Force per unit volume

    D

    Pressure = Momentum per unit volume per unit time

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    4.

    If F denotes force and t time, then in equation F=at1+  bt2,F = a{t^{ - 1}} + \;b{t^2},, the dimensions of a and b respectively are

    A

    [LT4]  and  [LT1]\left[ {{\rm{L}}{{\rm{T}}^{ - 4}}} \right]{\rm{\;and\;}}\left[ {{\rm{L}}{{\rm{T}}^{ - 1}}} \right]

    B

    [LT1]  and  [LT4]\left[ {{\rm{L}}{{\rm{T}}^{ - 1}}} \right]{\rm{\;and\;}}\left[ {{\rm{L}}{{\rm{T}}^{ - 4}}} \right]

    C

    [MLT4]  and  [MLT1]\left[ {{\rm{ML}}{{\rm{T}}^{ - 4}}} \right]{\rm{\;and\;}}\left[ {{\rm{ML}}{{\rm{T}}^{ - 1}}} \right]

    D

    [MLT1]  and  [MLT4]\left[ {{\rm{ML}}{{\rm{T}}^{ - 1}}} \right]{\rm{\;and\;}}\left[ {{\rm{ML}}{{\rm{T}}^{ - 4}}} \right]

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    8.

    If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.

    A

    [F][A][T1]{\rm{[F][A][}}{{\rm{T}}^{ - 1}}{\rm{]}}

    B

    [F][A1][T]{\rm{[F][}}{{\rm{A}}^{ - 1}}{\rm{][T]}}

    C

    [F][A][T]{\rm{[F][A][T]}}

    D

    [F][A][T2]{\rm{[F][A][}}{{\rm{T}}^2}{\rm{]}}

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    9.

    The speed of light (c), gravitational constant (G) and Planck’s constant (h) are taken as the fundamental units in a system. The dimension of time in this new system should be

    A

    G1/2h1/2c5/2{G^{1/2}}{h^{1/2}}{c^{ - 5/2}}

    B

    G1/2h1/2c1/2{G^{ - 1/2}}{h^{1/2}}{c^{1/2}}

    C

    G1/2h1/2c3/2{G^{1/2}}{h^{1/2}}{c^{ - 3/2}}

    D

    G1/2h1/2c1/2{G^{1/2}}{h^{1/2}}{c^{1/2}}

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