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    Gravitation - MCQ/Assertion and Reason-03/03/2021

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    mithunjai pandikannan
    The document contains 12 multiple choice questions related to concepts in gravitation. The questions cover topics such as gravitational force compared to electrical force, gravitational constant, acceleration due to gravity, centripetal force, tidal waves, weight at different locations on Earth, escape velocity from Earth and the moon, and properties of satellites orbiting Earth.

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    Gravitation - MCQ/Assertion and Reason-03/03/2021

    Uploaded by

    mithunjai pandikannan
    13 views4 pages
    The document contains 12 multiple choice questions related to concepts in gravitation. The questions cover topics such as gravitational force compared to electrical force, gravitational constant, acceleration due to gravity, centripetal force, tidal waves, weight at different locations on Earth, escape velocity from Earth and the moon, and properties of satellites orbiting Earth.

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    The document contains 12 multiple choice questions related to concepts in gravitation. The questions cover topics such as gravitational force compared to electrical force, gravitational constant, acceleration due to gravity, centripetal force, tidal waves, weight at different locations on Earth, escape velocity from Earth and the moon, and properties of satellites orbiting Earth.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    13 views4 pages

    Gravitation - MCQ/Assertion and Reason-03/03/2021

    Uploaded by

    mithunjai pandikannan
    The document contains 12 multiple choice questions related to concepts in gravitation. The questions cover topics such as gravitational force compared to electrical force, gravitational constant, acceleration due to gravity, centripetal force, tidal waves, weight at different locations on Earth, escape velocity from Earth and the moon, and properties of satellites orbiting Earth.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
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    Gravitation –MCQ/Assertion and Reason- 03/03/2021

    1.

    Assertion : Gravitational force between two particles is negligibly small


    compared to the electrical force. Reason : The electrical force is experienced by
    charged particles only.

    A)
    If both assertion and reason are true and the reason is the correct
    explanation of the assertion.
    B)
    If both assertion and reason are true but reason is not the correct
    explanation of the assertion.
    C)
    If assertion is true but reason is false.
    D)
    If the assertion and reason both are false.
    E)
    If assertion is false but reason is true.

    2.)

    Assertion : Gravitational force between two particles is negligibly small


    compared to the electrical force. Reason : The electrical force is experienced by
    charged particles only.

    A)
    If both assertion and reason are true and the reason is the correct
    explanation of the assertion.
    B)
    If both assertion and reason are true but reason is not the correct
    explanation of the assertion.
    C)
    If assertion is true but reason is false.
    D)
    If the assertion and reason both are false.
    E)
    If assertion is false but reason is true.

    3.

    Assertion : The universal gravitational constant is same as acceleration due to


    gravity. Reason : Gravitational constant and acceleration due to gravity have
    same dimensional formula.

    A)
    If both assertion and reason are true and the reason is the correct
    explanation of the assertion.
    B)
    If both assertion and reason are true but reason is not the correct
    explanation of the assertion.
    C)
    If assertion is true but reason is false.
    D)
    If the assertion and reason both are false.
    E)
    If assertion is false but reason is true.

    4.

    Assertion : If a pendulum is suspended in a lift and lift is falling freely, then its
    time period becomes infinite. Reason : Free falling body has acceleration equal
    to acceleration due to gravity.

    A)
    If both assertion and reason are true and the reason is the correct
    explanation of the assertion.
    B)
    If both assertion and reason are true but reason is not the correct
    explanation of the assertion.
    C)
    If assertion is true but reason is false.
    D)
    If the assertion and reason both are false.
    E)
    If assertion is false but reason is true.

    5.

    Assertion : A force act upon the earth revolving in a circular orbit about the sun.
    Hence work should be done on the earth. Reason : The necessary centripetal
    force for circular motion of earth comes from the gravitational force between
    earth and sun.

    A)
    If both assertion and reason are true and the reason is the correct
    explanation of the assertion.
    B)
    If both assertion and reason are true but reason is not the correct
    explanation of the assertion.
    C)
    If assertion is true but reason is false.
    D)
    If the assertion and reason both are false.
    E)
    If assertion is false but reason is true.

    6.

    The tidal waves in the sea are primarily due to

    A)
    The gravitational effect of the moon on the earth
    B)
    The gravitational effect of the sun on the earth
    C)
    The gravitational effect of venus on the earth
    D)
    The atmospheric effect of the earth itself

    9. A body weighs 500 N on the surface of the earth. How much would it weight half way below
    the surface of the earth?

    (a) 1000 N
    (b) 500 N
    (c) 250 N
    (d) 125 N

    10. There is no atmosphere on the moon because

    (a) it is closer to the earth


    (b) it revolves round the earth
    (c) it gets light from the sun
    (d) the escape velocity of gas molecules is less than their root mean square velocity here

    11. The escape velocity of projection from the earth is approximately (R = 6400 km)

    (a) 7 km/sec
    (b) 112 km/sec
    (c) 12.2 km/sec
    (d) 1.1 km/sec

    12. A satellite S is move in an elliptical orbit around the earth. The mass of the satellite is very
    small compared to the mass of the earth .

    (a) The acceleration of S is always directed towards the centre of the earth.
    (b) The angular momentum of S about the centre of the earth changes in direction, but its
    magnitude remains constant.
    (c) The total mechanical energy of S varies periodically with time.
    (d) The linear momentum of S remains constant in magnitude.

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