JEE Main & Advanced Physics Gravitation / गुरुत्वाकर्षण Question Bank

done Newtons Law of Gravitation Total Questions - 24

• question_answer1)
  The tidal waves in the sea are primarily due to
  A)
  The gravitational effect of the moon on the earth done clear
  B)
  The gravitational effect of the sun on the earth done clear
  C)
  The gravitational effect of venus on the earth done clear
  D)
  The atmospheric effect of the earth itself done clear
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• question_answer2)
  If there were a smaller gravitational effect, which of the following forces do you think would alter in some respect [NCERT 1978]
  A)
  Viscous forces done clear
  B)
               As it depends on the weight of the body. done clear
  C)
  Electrostatic force                   done clear
  D)
  None of the above done clear
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• question_answer3)
   A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will    [AIIMS 1982; AIEEE 2002]
  A)
  Continue to move with velocity v along the original orbit done clear
  B)
  Move with a velocity v, tangentially to the original orbit done clear
  C)
  Fall down with increasing velocity done clear
  D)
  Ultimately come to rest somewhere on the original orbit done clear
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• question_answer4)
  The atmosphere is held to the earth by        [IIT 1986]
  A)
  Winds    done clear
  B)
  Gravity done clear
  C)
  Clouds done clear
  D)
               None of the above done clear
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• question_answer5)
  The weight of a body at the centre of the earth is [AFMC 1988]
  A)
                              Zero  done clear
  B)
  Infinite done clear
  C)
  Same as on the surface of earth done clear
  D)
  None of the above done clear
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• question_answer6)
   If the distance between two masses is doubled, the gravitational attraction between them [CPMT 1973; AMU (Med.) 2000]
  A)
  Is doubled                               done clear
  B)
  Becomes four times done clear
  C)
  Is reduced to half                    done clear
  D)
  Is reduced to a quarter done clear
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• question_answer7)
  Which of the following is the evidence to show that there must be a force acting on earth and directed towards the sun [AIIMS 1980]
  A)
  Deviation of the falling bodies towards east done clear
  B)
  Revolution of the earth round the sun done clear
  C)
  Phenomenon of day and night done clear
  D)
  Apparent motion of sun round the earth done clear
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• question_answer8)
  The gravitational force between two stones of mass 1 kg each separated by a distance of 1 metre in vacuum is [DPMT 1984]
  A)
  Zero  done clear
  B)
                 \[6.675\times {{10}^{-5}}\,newton\] done clear
  C)
                \[6.675\times {{10}^{-11}}\,newton\] done clear
  D)
                 \[6.675\times {{10}^{-8}}\,newton\] done clear
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• question_answer9)
  Two particles of equal mass go round a circle of radius R under the action of their mutual gravitational attraction. The speed of each particle is [CBSE PMT 1995; RPMT 2003]
  A)
                 \[v=\frac{1}{2R}\sqrt{\frac{1}{Gm}}\]       done clear
  B)
                 \[v=\sqrt{\frac{Gm}{2R}}\] done clear
  C)
                \[v=\frac{1}{2}\sqrt{\frac{Gm}{R}}\] done clear
  D)
                              \[v=\sqrt{\frac{4Gm}{R}}\] done clear
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• question_answer10)
  The earth (mass \[=6\times {{10}^{24}}\,kg)\]) revolves round the sun with angular velocity \[2\times {{10}^{-7}}\,rad/s\] in a circular orbit of radius \[1.5\times {{10}^{8}}\,km\]. The force exerted by the sun on the earth in newtons, is [CBSE PMT 1995; AFMC 1999; Pb. PMT 2003]
  A)
                 \[18\times {{10}^{25}}\]                             done clear
  B)
  Zero done clear
  C)
                \[27\times {{10}^{39}}\] done clear
  D)
                              \[36\times {{10}^{21}}\] done clear
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• question_answer11)
  Gravitational mass is proportional to gravitational                  [AIIMS 1998]
  A)
                              Field done clear
  B)
  Force done clear
  C)
  Intensity done clear
  D)
  All of these done clear
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• question_answer12)
  The gravitational force between two point masses \[{{m}_{1}}\] and \[{{m}_{2}}\] at separation r is given by \[F=k\frac{{{m}_{1}}{{m}_{2}}}{{{r}^{2}}}\] The constant k                               [CPMT 1993]
  A)
  Depends on system of units only done clear
  B)
  Depends on medium between masses only done clear
  C)
  Depends on both (a) and (b) done clear
  D)
  Is independent of both (a) and (b) done clear
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• question_answer13)
  The distance of the centres of moon and earth is D. The mass of earth is 81 times the mass of the moon. At what distance from the centre of the earth, the gravitational force will be zero                                 [RPET 1996]
  A)
                 \[\frac{D}{2}\]        done clear
  B)
                 \[\frac{2D}{3}\] done clear
  C)
                \[\frac{4D}{3}\]      done clear
  D)
                 \[\frac{9D}{10}\] done clear
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• question_answer14)
  Who among the following gave first the experimental value of G                                    [AFMC 1997]
  A)
  Cavendish done clear
  B)
               Copernicus done clear
  C)
  Brook Teylor done clear
  D)
               None of these done clear
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• question_answer15)
  The mass of the moon is \[7.34\times {{10}^{22}}\,kg\] and the radius is \[1.74\times {{10}^{6}}\,m\]. The value of gravitation force will be [AMU 1999]
  A)
  1.45 N/kg done clear
  B)
               1.55 N/kg done clear
  C)
  1.75 N/kg done clear
  D)
               1.62 N/kg done clear
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• question_answer16)
  The centripetal force acting on a satellite orbiting round the earth and the gravitational force of earth acting on the satellite both equal F. The net force on the satellite is    [AMU 1999]
  A)
  Zero done clear
  B)
  F done clear
  C)
           \[F\sqrt{2}\]                   done clear
  D)
  2 F done clear
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• question_answer17)
  Reason of weightlessness in a satellite is [RPMT 2000]
  A)
  Zero gravity done clear
  B)
  Centre of mass done clear
  C)
  Zero reaction force by satellite surface done clear
  D)
  None done clear
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• question_answer18)
  Mass M is divided into two parts xM and \[(1-x)\,M\]. For a given separation, the value of x for which the gravitational attraction between the two pieces becomes maximum is [EAMCET 2001]
  A)
           \[\frac{1}{2}\]               done clear
  B)
           \[\frac{3}{5}\] done clear
  C)
  1       done clear
  D)
  2 done clear
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• question_answer19)
  The force of gravitation is                     [AIIMS 2002]
  A)
  Repulsive done clear
  B)
               Electrostatic done clear
  C)
  Conservative done clear
  D)
               Non-conservative done clear
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• question_answer20)
  The gravitational force \[{{F}_{g}}\] between two objects does not depend on                 [RPET 2003]
  A)
  Sum of the masses done clear
  B)
  Product of the masses done clear
  C)
  Gravitational constant done clear
  D)
  Distance between the masses done clear
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• question_answer21)
  Two sphere of mass m and M are situated in air and the gravitational force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The gravitational force will now be            [CBSE PMT 2003]
  A)
  F      done clear
  B)
           \[\frac{F}{3}\] done clear
  C)
                \[\frac{F}{9}\]         done clear
  D)
  3 F done clear
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• question_answer22)
  Earth binds the atmosphere because of [J&K CET 2005]
  A)
  Gravity done clear
  B)
               Oxygen between earth and atmosphere done clear
  C)
  Both (a) and (b) done clear
  D)
  None of these done clear
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• question_answer23)
  Which of the following statements about the gravitational constant is true               [Kerala PET 2005]
  A)
  It is a force done clear
  B)
               It has no unit done clear
  C)
  It has same value in all systems of units done clear
  D)
  It depends on the value of the masses done clear
  E)
  It does not depend on the nature of the medium in which the bodies are kept. done clear
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• question_answer24)
  Two identical solid copper spheres of radius R placed in contact with each other. The gravitational attracton between them is proportional to                                      [Kerala PET 2005]
  A)
                 \[{{R}^{2}}\]        done clear
  B)
                 \[{{R}^{-2}}\] done clear
  C)
                \[{{R}^{4}}\]        done clear
  D)
                 \[{{R}^{-4}}\] done clear
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