Important Questions of Gravitation Physics | Zigya

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
21.

Suppose the gravitational force varies inversely as the nth power of distance. Then the time period planet in circular orbit of radius R around the sun will be proportional to

  • straight R to the power of open parentheses fraction numerator straight n plus 1 over denominator 2 end fraction close parentheses end exponent
  • straight R to the power of open parentheses fraction numerator straight n minus 1 over denominator 2 end fraction close parentheses end exponent
  • Rn

  • Rn

874 Views

22.

A comet orbits around the Sun in an elliptical orbit. Which of the following quantities remains constant during the course of its motion ?

  • Linear velocity

  • Angular velocity

  • Angular momentum

  • Kinetic energy


23.

Consider a satellite moving in a circular orbit around Earth. If K and V denote its kinetic energy and potential energy respectively, then (Choose the convention, where V = 0 as r → ∞)

  • K = V

  • K = 2V

  • V = − 2K

  • K = − 2V


24.

Assuming the mass of Earth to be ten times the mass of Mars, its radius to be twice the radius of Mars and the acceleration due to gravity on the surface of Earth is 10 m/s2. Then the acceleration due to gravity on the surface of Mars is given by

  • 0.2 m/s2

  • 0.4 m/s2

  • 2 m/s2

  • 4 m/s2


Advertisement
25.

The semi-major axis of the orbit of Saturn is approximately nine times that of Earth. The time period of revolution of Saturn is approximately equal to

  • 81 years

  • 27 years

  • 729 years

  • 813 years


26.

A body hanging from a massless spring stretches it by 3 cm on Earth's surface. At a place 800 km above the Earth's surface, the same body will stretch the spring by (Radius of Earth = 6400 km)

  • 3427 cm

  • 6427 cm

  • 2764 cm

  • 2734 cm


27.

The acceleration due to gravity on the surface of a planet is one-fourth of the value on Earth. When a brass ball is brought to this planet, its

  • mass is halved

  • weight is halved

  • mass becomes one-fourth

  • weight becomes one-fourth


28.

Polar satellites

  • are high altitude satellite

  • are widely used for telecommunication

  • are used for environmental studies

  • go around the Earth in a East-West direction


Advertisement
29.

Angular momentum of the Earth revolving around the Sun in a circular orbit of radius R is proportional to

  • R

  • R

  • R2

  • R1/3


30.

A body of mass m is released from a height equal to the radius R of the Earth. The velocity with which it will strike the Earth's surface is

  • 2gR

  • gR

  • 2 mgR

  • mgR


Advertisement