Gravitation (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 16  20 of 84
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Question number: 16
» Gravitation » Orbital Velocity of a Satellite
Question
A satellite has to revolve round the earth in a circular orbit of radius 8 ⨯ 10 ^{3} km. The velocity of projection of the satellite in this orbit will be 
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 17
» Gravitation » Kepler's Laws of Planetary Motion
Question
The Jupiter s period of revolution round the Sun is 10 times that of the Earth. Assuming the planetary orbits are circular, how many times the distance between the Jupiter and Sun exceeds that between the Earth and the sun.
Choices
Choice (4)  Response  

a.  5.242 

b.  2.242 

c.  4.641 

d.  4.242 

Question number: 18
» Gravitation » Escape Velocity
Question
Acceleration due to gravity on a planet is 12 times the value on the earth. Escape velocity for the planet and the earth are V _{p} and V _{e} respectively. The ratio of the radii of the planet and the earth is 2: 1, then –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 19
» Gravitation » Gravitational Potential
Assertion (Ꭺ)
Gravitational potential of earth at every place on it is negative.
Reason (Ꭱ)
Everybody on earth is bound by the attraction of earth.
Choices
Choice (4)  Response  

a.  Ꭺ is false but Ꭱ is true 

b.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

c.  Both Ꭺ and Ꭱ are false 

d.  Ꭺ is true but Ꭱ is false 

Question number: 20
» Gravitation » Gravitational Acceleration
Question
Two planets of radii in the ratio 1: 2 are made from the materials of density in the ratio 3: 1. Then the ratio of acceleration due to gravity g _{1} /g _{2} at the surface of two planets will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  1 
