1.

    Assuming the mass of Earth as 6.64imes1024kg6.64 imes {10^{24}}kg and the average mass of the atoms that make up earth as 40u (atomic mass unit), the number of atoms in the Earth are approximately

    A

    1030{10^{30}}

    B

    1040{10^{40}}

    C

    1050{10^{50}}

    D

    1060{10^{60}}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :mass, atomic mass unit, mole concept, conversion

    Related Questions

    1.

    A weber is equivalent to

    A

    A m−2A\,{m^{ - 2}}

    B

    A m−1A\,{m^{ - 1}}

    C

    A m2A\,{m^2}

    D

    T m2T\,{m^2}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Magnetic flux, Weber, Tesla

    2.

    Universal time is based on

    A

    Rotation of earth on its axis

    B

    Oscillations of quartz crystal

    C

    Vibrations of cesium atom

    D

    Earth’s orbital motion around the sun

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Universal Time, Earth's Rotation

    3.

    There are atomic clocks capable of measuring time with an accuracy of 1 part in 1011{10^{11}}. If two such clocks are operated with precision, then after running for 5000 years, these will record

    A

    A difference of nearly 1 s

    B

    A difference of 1 day

    C

    A difference of 1011{10^{11}} s

    D

    A difference of 1 year

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Error analysis, unit conversion, time calculation

    4.

    Wavelength of ray of light is 0.00006 m. It is equal to

    A

    6 micron

    B

    60 micron

    C

    600 micron

    D

    0.6 micron

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :unit conversion, wavelength, microns

    5.

    Temperature can be expressed as a derived quantity in terms of any of the following

    A

    Heat

    B

    Internal Energy

    C

    Mass and Velocity

    D

    None of the above

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Derived quantities, fundamental quantities, temperature

    6.

    Which of the following is not represented in correct unit

    A

    StressStrain=N/m2\frac{{{\rm{Stress}}}}{{{\rm{Strain}}}} = N/{m^2}

    B

    Surface tension =N/m

    C

    Energy =kg-m/sec

    D

    Pressure =N/m2 = N/{m^2}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Units, Stress, Strain, Surface Tension, Energy, Pressure

    7.

    The unit of permittivity of free space ε0{\varepsilon _0} is

    A

    Coulomb/newton-metre

    B

    Newton−metre2/coulomb2Newton - metr{e^2}/coulom{b^2}

    C

    Coulomb2/(newton−metre)2Coulom{b^2}/{\left( {newton - metre} \right)^2}

    D

    Coulomb2/newton−metre2Coulom{b^2}/newton - metr{e^2}

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Permittivity of free space, Coulomb's Law, Units of measurement

    8.

    If the units of mass, length and time are doubled, unit of angular momentum will be

    A

    Doubled

    B

    Tripled

    C

    Quadrupled

    D

    8 times the original value

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Angular Momentum, Units and Dimensions

    9.

    Which of the following physical quantities has neither dimensions nor unit?

    A

    Angle

    B

    Luminous intensity

    C

    Coefficient of friction

    D

    Current

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Dimensions, Units, Coefficient of friction, Angle, Luminous intensity, Current

    10.

    What will be the unit of time in that system in which the unit of length is metre, unit of mass is kg and unit of force is kg wt?

    A

    (9.8)2 sec⁡{\left( {9.8} \right)^2}\,\sec

    B

    9.8 sec

    C

    9.8 sec⁡\sqrt {9.8} \,\sec

    D

    19.8 sec⁡\frac{1}{{\sqrt {9.8} }}\,\sec

    Question Tags
    📚 Subject:Physics
    📑 Chapter:Units And Measurement
    🎯Topic:Priniciple Of Homoginity
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Units and Dimensions, Force, Newton's Second Law

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