1.

    The Planck constant is 6.626imes10−346.626 imes 10^{-34} J s. Express this in units of eV s (electron-volt seconds), given 1 eV = 1.602imes10−191.602 imes 10^{-19} J.

    A

    4.136imes10−154.136 imes 10^{-15} eV s

    B

    1.062imes10−521.062 imes 10^{-52} eV s

    C

    2.418imes10142.418 imes 10^{14} eV s

    D

    6.626imes10−156.626 imes 10^{-15} eV s

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Unit Conversion, Energy, Planck's Constant

    Related Questions

    1.

    If V denotes the potential difference across the plates of a capacitor of capacitance C, the dimensions of CV2C{V^2} are

    A

    Not expressible in MLT

    B

    MLT−2ML{T^{ - 2}}

    C

    M2LT−1{M^2}L{T^{ - 1}}

    D

    ML2T−2M{L^2}{T^{ - 2}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Capacitance, Potential Difference, Energy stored in a capacitor, Dimensional analysis

    2.

    Dimensional formula for torque is

    A

    L2MT−2{L^2}M{T^{ - 2}}

    B

    L−1MT−2{L^{ - 1}}M{T^{ - 2}}

    C

    L2MT−3{L^2}M{T^{ - 3}}

    D

    LMT−2LM{T^{ - 2}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :torque, dimensional analysis, force, distance

    3.

    The only mechanical quantity which has negative dimension of mass is

    A

    Angular momentum

    B

    Torque

    C

    Coefficient of thermal conductivity

    D

    Gravitational constant

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensional analysis, Gravitational constant, Angular momentum, Torque, Thermal conductivity

    4.

    The dimensions of couple are

    A

    ML2T−2M{L^2}{T^{ - 2}}

    B

    MLT−2ML{T^{ - 2}}

    C

    ML−1T−3M{L^{ - 1}}{T^{ - 3}}

    D

    ML−2T−2M{L^{ - 2}}{T^{ - 2}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Couple, Dimensions, Torque, Force, Distance

    5.

    The dimensional formula for impulse is

    A

    MLT−2ML{T^{ - 2}}

    B

    MLT−1ML{T^{ - 1}}

    C

    ML2T−1M{L^2}{T^{ - 1}}

    D

    M2LT−1{M^2}L{T^{ - 1}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Impulse, Dimensional Analysis

    6.

    According to Newton, the viscous force acting between liquid layers of area A and velocity gradient Δv/Δz\Delta v/\Delta z is given by F=−ηAΔvΔxF = - \eta A\frac{{{\rm{\Delta }}v}}{{{\rm{\Delta }}x}} where η\eta is constant called coefficient of viscosity. The dimensions of η\eta are

    A

    [ML2T−2]\left[ {M{L^2}{T^{ - 2}}} \right]

    B

    [ML−1T−1]\left[ {M{L^{ - 1}}{T^{ - 1}}} \right]

    C

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

    D

    [M0L0T0]\left[ {{M^0}{L^0}{T^0}} \right]

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensional Analysis, Viscosity, Force

    7.

    The dimensions of permittivity ε0{\varepsilon _0} are

    A

    A2T2M−1L−3{A^2}{T^2}{M^{ - 1}}{L^{ - 3}}

    B

    A2T4M−1L−3{A^2}{T^4}{M^{ - 1}}{L^{ - 3}}

    C

    A−2T−4ML3{A^{ - 2}}{T^{ - 4}}M{L^3}

    D

    A2T−4M−1L−3{A^2}{T^{ - 4}}{M^{ - 1}}{L^{ - 3}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Permittivity, Dimensional Analysis, Coulomb's Law

    8.

    Young’s modulus of a material has the same units as

    A

    Pressure

    B

    Strain

    C

    Compressibility

    D

    Force

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Young's modulus, Pressure, Units, Dimensional Analysis

    9.

    The physical quantity which has the dimensional formula [M1T−3]\left[ {{{\rm{M}}^1}{{\rm{T}}^{ - 3}}} \right] is

    A

    Surface tension

    B

    Density

    C

    Solar constant

    D

    Compressibility

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensional Analysis, Solar Constant, Surface Tension, Density, Compressibility

    10.

    If force is proportional to square of velocity, then the dimensions of proportionality constant are

    A

    [ML−1T]\left[ {{\rm{M}}{{\rm{L}}^{ - 1}}{\rm{T}}} \right]

    B

    [ML−1T0]\left[ {{\rm{M}}{{\rm{L}}^{ - 1}}{{\rm{T}}^0}} \right]

    C

    [MLT0]\left[ {{\rm{ML}}{{\rm{T}}^0}} \right]

    D

    [M0LT−1]\left[ {{{\rm{M}}^0}{\rm{L}}{{\rm{T}}^{ - 1}}} \right]

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Conversion Of Units For One System To Another
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensional Analysis, Force, Velocity

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