Which of the following statements about the gravitational constan

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 Multiple Choice QuestionsMultiple Choice Questions

201.

If the radius of the earth is reduced by 1% without changing its mass. The change in g will be

  • 2% decrease

  • 2% increases

  • 1% decrease

  • 1% increases


202.

If the change in the value of g at a height h above the surface of the earth is the same as at a depth x below in surface, then

  • x = h2

  • x = 0.5 h

  • x = 2h

  • x = h


203.

Radius of orbit of satellite of earth is R its kinetic energy is proportional to

  • 1R

  • 1R

  • R

  • 1R3


204.

On an electron in an atom both electric and gravitational forces are collinear we neglect gravitational force (FG) in comparision to electric force (FE ), because

  • FE > FG

  • FN > FE

  • FE >> FG

  • FN >> FG


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205.

The gravitational field is given by E = − xi − 2y2j. When gravitational potential is zero at (0, 0), then the gravitational potential at (2, 1) is

  • 3 unit

  • 6 unit

  • 9 unit

  • 12 unit


206.

A satellite orbiting the earth in a circular orbit of radius R completes one revolution in 3 h. If orbital radius of geostationarysatellite is 36,000 km, orbital radius of earth is 

  • 6000 km

  • 9000 km

  • 12000 km

  • 15000 km


207.

Acceleration due to gravity is g on the surface of the earth. Then the value of the acceleration due to gravity at a height of 32 km above earth's surface is (Assume radius of earth to be 6400 km)

  • 0.99 g

  • 0.8 g

  • 1.01 g

  • 0.9 g


208.

If the mass of moon is 190 of earth's mass, its radius is 13 of earth's radius and if g is acceleration due to gravity on earth, then the acceleration due to gravity on moon is

  • g3

  • g90

  • g10

  • g9


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209.

Which of the following statements about the gravitational constant is true ?

  • It is a force

  • It has no unit

  • It has same value in all systems of units

  • It does not depend on the nature of the medium in which the bodies are kept


D.

It does not depend on the nature of the medium in which the bodies are kept

Gravitational constant does not depend on the nature of the medium in which the bodies are kept.


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210.

Two identical solid copper spheres of radius R are placed in contact with each other. The gravitational attraction  between them is proportional to

  • R2

  • R-2

  • R4

  • R-4


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