JEE PHYSICS UNIT 06
QUIZ NO 1
TOTAL QUESTIONS = 20


1. The gravitational potential energy of a system of two particles of masses m₁ and m₂ separated by a distance r is


2. The escape velocity of a body from the surface of a planet depends on


3. The orbital speed of a satellite close to the Earth’s surface is approximately


4. The time period of a satellite orbiting close to the Earth’s surface is


5. The acceleration due to gravity at the surface of a planet is g. At a height equal to the radius of the planet, the acceleration due to gravity will be


6. The value of g at the surface of Earth decreases due to


7. The variation of g with depth d below the surface of Earth is proportional to


8. The ratio of escape velocity to orbital velocity at the surface of the Earth is


9. The total energy of a satellite in a stable orbit is always


10. The binding energy of a satellite of mass m in a circular orbit of radius r around a planet of mass M is given by


11. Two satellites are orbiting the Earth in circular orbits of radii r and 2r. The ratio of their orbital speeds is


12. The gravitational potential at a point on the surface of a planet of mass M and radius R is given by


13. If the Earth’s radius were to shrink to half its current value, keeping the mass the same, the acceleration due to gravity on the surface would


14. Kepler's second law of planetary motion is a consequence of


15. If the gravitational force between two objects were to disappear, their relative motion would be


16. A satellite in a circular orbit of radius r around Earth has a time period T. The time period of a satellite orbiting at radius 2r will be


17. The gravitational force between two point masses is


18. The work done in moving a mass m from a point at infinity to a point at distance r from a mass M is


19. The gravitational potential energy of a body of mass m at a height h from the surface of the Earth is approximately


20. Two planets have masses M₁ and M₂ and radii R₁ and R₂ respectively. The ratio of escape velocities from their surfaces is



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