JEE Questions for Physics Gravitation Quiz 7 - MCQExams.com

The acceleration due to gravity on a planet is same as that on earth and its radius is four times that of earth. What will be the value of escape velocity on that planet if it is Ve on the earth
  • Ve
  • 2 Ve
  • 4 Ve
  • Ve/2

Physics-Gravitation-74224.png

  • Physics-Gravitation-74225.png
  • 2)
    Physics-Gravitation-74226.png

  • Physics-Gravitation-74227.png

  • Physics-Gravitation-74228.png
A particle of mass M is situated at the centre of a spherical shell of same mass and radius a the magnitude of gravitational potential at a point situated at a /2 distance from the centre will be

  • Physics-Gravitation-74230.png
  • 2)
    Physics-Gravitation-74231.png

  • Physics-Gravitation-74232.png

  • Physics-Gravitation-74233.png

Physics-Gravitation-74235.png
  • 11.2
  • 12.38
  • 59.5
  • 618
The mass of a space ship is 1000 kg. It is to be launched from earth’s surface out into free space the value of g and R (radius of earth) are 10ms–2 and 6400 km respectively the required energy for this work will be = ................. J

  • Physics-Gravitation-74237.png
  • 2)
    Physics-Gravitation-74238.png

  • Physics-Gravitation-74239.png

  • Physics-Gravitation-74240.png
The diagram showing the variation of gravitational potential of earth with distance from the centre of earth is

  • Physics-Gravitation-74242.png
  • 2)
    Physics-Gravitation-74243.png

  • Physics-Gravitation-74244.png

  • Physics-Gravitation-74245.png

Physics-Gravitation-74247.png

  • Physics-Gravitation-74248.png
  • 2)
    Physics-Gravitation-74249.png

  • Physics-Gravitation-74250.png

  • Physics-Gravitation-74251.png
Which one of the following graphs represents correctly the variation of the gravitational field with the distance (r) from the centre of spherical shell of mass M and radius a

  • Physics-Gravitation-74253.png
  • 2)
    Physics-Gravitation-74254.png

  • Physics-Gravitation-74255.png

  • Physics-Gravitation-74256.png
Which of the following graphs represents the motion of a planet moving about the sun.

  • Physics-Gravitation-74258.png
  • 2)
    Physics-Gravitation-74259.png

  • Physics-Gravitation-74260.png

  • Physics-Gravitation-74261.png
The curves for P.E. (U) K.E. (Ek) of two particle system as shown in figure . At what points System will be bound.
Physics-Gravitation-74263.png
  • Only at point D
  • Only at point A
  • At point D and A
  • At points A, B and C
The correct graph representing the variation of total energy (E) kinetic energy (K) and potential energy (U) of a satellite with its distance from the centre of earth is...........

  • Physics-Gravitation-74264.png
  • 2)
    Physics-Gravitation-74265.png

  • Physics-Gravitation-74266.png

  • Physics-Gravitation-74267.png
A shell of mass M and radius R has a point mass m placed at a distance r from its centre. The gravitational potential energy U(r) –v will be

  • Physics-Gravitation-74269.png
  • 2)
    Physics-Gravitation-74270.png

  • Physics-Gravitation-74271.png

  • Physics-Gravitation-74272.png
If Ve and Vo are represent the escape velocity and orbital velocity of satellite corresponding to a circular orbit of radius r, then

  • Physics-Gravitation-74273.png
  • 2)
    Physics-Gravitation-74274.png

  • Physics-Gravitation-74275.png

  • Physics-Gravitation-74276.png
If r represents the radius of the orbit of a satellite of mass m moving around a planet of mass M, the velocity of the satellite is given by

  • Physics-Gravitation-74278.png
  • 2)
    Physics-Gravitation-74279.png

  • Physics-Gravitation-74280.png

  • Physics-Gravitation-74281.png
Two satellites of mass m1 and m2 (m1 > m2) are revolving round the earth in circular orbits of r1 and r2 (r1 > r2) respectively. Which of the following statement is true regarding their speeds V1 and V2

  • Physics-Gravitation-74282.png
  • 2)
    Physics-Gravitation-74283.png

  • Physics-Gravitation-74284.png

  • Physics-Gravitation-74285.png
The centre of earth in new orbit is two times of the earlier orbit. The time period in second orbit is .........hours.
  • 4.8
  • 2)
    Physics-Gravitation-74287.png
  • 24

  • Physics-Gravitation-74288.png
As astronaut orbiting the earth in a circular orbit 120 km above the surface of earth, gently drops a spoon out of space-ship. The spoon will
  • Fall vertically down to the earth
  • Move towards the moon
  • Will move along with space – ship
  • Will move in an irregualr way then fall down to earth
The period of a satellite in cirular orbit around a planet is independent of
  • The mass of the planet
  • The radius of the planet
  • Mass of the satellite
  • All the three parameters (A), (B) and (C)
Two satellites A and B go round a planet p in circular orbits having radii 4 R and R respectively if the speed of the satellite A is 3V, the speed if satellite B will be
  • 12V
  • 6V
  • 4/3 V
  • 3/2 V
A small satellite is revolving near earth’s surface. Its orbital velocity will be nearly = ..........kms–1.
  • 8
  • 4
  • 6
  • 11.2
A satellite revolves around the earth in an elliptical orbit. Its speed
  • Is the same at all points in the orbit
  • Is greatest when it is closest to the earth
  • Is greatest when it is farthest to the earth
  • Goes on increasing or decresing continuously depending upon the mass of the satellite
If the height of a satellite from the earth is negligible in comparison of the radius of the earth R, the orbital velocity of the satellite is ...........
  • gR
  • gR/2

  • Physics-Gravitation-74291.png

  • Physics-Gravitation-74292.png
A satellite is moving around the earth with speed v in a circular orbit of radius r. If the orbit radius is decreased by 1% its speed will
  • Increase by 1%
  • Increase by 0.5%
  • Decrease by 1%
  • Decrease by 0.5%
Orbital velocity of an artifiicial satellite does not depend upon
  • Mass of earth
  • Mass of satellite
  • Radius of earth
  • Acceleration due to gravity
Orbital velocity of earth’s satellite near the surface is 7 kms–1. when the radius of orbit is 4 times that of earth’s radius, then orbital velocity in that orbit is = ………kms–1
  • 3.5
  • 17
  • 14
  • 35
Two identical satellites are at R and 7R away from each surface, the wrong statement is (R - Radius of earth)
  • Ratio of total energy will be 4
  • Ratio of kinetic energies will be 4
  • Ratio of potential energies will be 4
  • Ratio of total energy will be 4 but ratio of potential and kinetic energies will be 2
Which one of following sttements regarding artificial satellite of earth is incorrect
  • The orbital velocity depends on the mass of the satellite
  • A minimum velocity of 8kms–1is required by a satellite to orbit quite close to the earth
  • The period of revolution is large if the radius of its orbit is large
  • The height of geostationary satellite is about 36000 km from earth
The weight of an astronuat, in an artificial satellite revolving around the earth is
  • Zero
  • Equal to that on the earth
  • More than that on earth
  • less than that on the earth
The distance of a geo-stationary satellite from the centre of the earth (Radius R = 6400km) is nearest to
  • 5R
  • 7R
  • 10R
  • 18R
A geo-stationary satellite is orbiting the earth of a height of 6R above the surface of earth, R being the radius of earth. The time period of another satellite at a height of 2.5 R from the surface fo earth is = ...............hr
  • 6
  • 2)
    Physics-Gravitation-74297.png
  • 10

  • Physics-Gravitation-74298.png

Physics-Gravitation-74300.png

  • Physics-Gravitation-74301.png
  • 2)
    Physics-Gravitation-74302.png

  • Physics-Gravitation-74303.png

  • Physics-Gravitation-74304.png
Which of the following quantities does not depend upon the orbital radius of the satellite ?

  • Physics-Gravitation-74602.png
  • 2)
    Physics-Gravitation-74603.png

  • Physics-Gravitation-74604.png

  • Physics-Gravitation-74605.png
A satellite moves around the earth in a circular orbit of radius r with speed v, If mass of the satellite is M , its total energy is

  • Physics-Gravitation-74306.png
  • 2)
    Physics-Gravitation-74307.png

  • Physics-Gravitation-74308.png

  • Physics-Gravitation-74309.png
A satellite with K.E. Ek is revolving round the earth in a circular orbit. How much more K.E. should be given to it so that it may just escape into outerspace ?

  • Physics-Gravitation-74311.png
  • 2)
    Physics-Gravitation-74312.png

  • Physics-Gravitation-74313.png

  • Physics-Gravitation-74314.png
Potential energy of a satellite having mass m and rotating at a height of 6.4 x 106 m fromthe surface of earth

  • Physics-Gravitation-74315.png
  • 2)
    Physics-Gravitation-74316.png

  • Physics-Gravitation-74317.png

  • Physics-Gravitation-74318.png
When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy, then r and v changes as
  • r and v bothe will increase
  • r and v both will decrease
  • r will decrease and v will increase
  • r will increase and v will decrease
The time period of a satellite of earth is 5 hours If the sepration between the earth and the satellite is increased to four times the previous value, the new time period will become ...... hours
  • 10
  • 120
  • 40
  • 80
A person sitting in a chair in a satellite feels weightless because
  • The earth does not attract the objects in a satellite
  • The normal force by the chair on the person balances the earth’s attraction
  • The normal force is zero
  • The person in satellite is not accelerated
Two satellites A and B go round a planet in circular orbits having radii 4R and R respectively If the speed of satellite A is 3v, then speed of satellite B is
  • 3v/2
  • 4v/2
  • 6v
  • 12v
A satellite moves in a circle around the earth, the radius of this circular is equal to one half of the radius of the moon’s orbit the satellite completes one revolution in .........lunar month
  • 1/2
  • 2/3

  • Physics-Gravitation-74323.png

  • Physics-Gravitation-74324.png
The additional K.E. to be provided to a satellite of mass m revolving around a planet of mass M, to transfer it from a circular orbit of radius R1 to another radius R2 (R2 > R1) is

  • Physics-Gravitation-74326.png
  • 2)
    Physics-Gravitation-74327.png

  • Physics-Gravitation-74328.png

  • Physics-Gravitation-74329.png
Rockets are launched in eastward direction to take advantage of
  • The clear sky on eastem side
  • The thiner atmosphere on this side
  • Earth’s rotation
  • Earth’s tilt
A satellite of mass m is orbiting close to the surface of the earth (Radius R = 6400 km) has a K.E. K. The corresponding K.E. of satellite to escape from the earth’s gravitational field is
  • k
  • 2 k
  • mg R
  • m k

Physics-Gravitation-74332.png

  • Physics-Gravitation-74333.png
  • 2)
    Physics-Gravitation-74334.png

  • Physics-Gravitation-74335.png

  • Physics-Gravitation-74336.png
The time period T of the moon of planet Mars(Mm) is related to its orbital radius R as (G = Gravitational constant)

  • Physics-Gravitation-74338.png
  • 2)
    Physics-Gravitation-74339.png

  • Physics-Gravitation-74340.png

  • Physics-Gravitation-74341.png
A geostationary satellite is orbiting the earth at a height of 5 R above that of surface of the earth. R being the radius of the earth. The time period of another satellite in hours at a height of 2R from the surface of earth is ............ hr
  • 5
  • 10

  • Physics-Gravitation-74343.png

  • Physics-Gravitation-74344.png
The figure shows elliptical orbit of a planet m about the sun s. the shaded area SCD is twice the shaded area SAB. If t1 is the time for the planet to move from C and D and t2 is the time to move from A to B then
Physics-Gravitation-74346.png

  • Physics-Gravitation-74347.png
  • 2)
    Physics-Gravitation-74348.png

  • Physics-Gravitation-74349.png

  • Physics-Gravitation-74350.png
The period of a satellite in a circular orbit of radius R is T. the period of another satellite in a circular orbit of radius 4R is
  • 4T
  • T/4
  • 8T
  • T/8
If the earth is at one- fourth of its present distance from the sun the duration of year will be
  • Half the pesent Year
  • One-eight the present year
  • One-fourth the present year
  • One-sixth the present year
The orbital speed of jupiter is
  • greater than the orbital speed of earth
  • less than the orbital speed of earth
  • equal to the orbital speed of earth
  • zero
0:0:1


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