CUET Level II JEE NEET - 6 [PHYSICS]

What happens to the gravitational potential at the centre of the uniform spherical shell which shrinks gradually?

• Remains constant

• Decreases

• Increases

• Oscillates

What is the relation between the escape velocity and orbital velocity of a satellite, if the satellite is close to the earth’s surface?

• V_e = √2V₀

• V_e = √2√V₀

• V₀ = √2√V_e

• v0 = ve

  
  

What happens to the weight of the body if the weight becomes 1/16 at a certain. Also, consider the radius of the earth to be R

• 4R

• 15R

• 5R

• 3R

What is the increase in the potential energy of the body with mass m if the body is taken at the height h which is equal to the radius of the earth?

• mgR

• 2mgR

• 1/2 mgR

• 1/4 mgR

Consider a body of mass m which needs to be moved from an orbit of radius 2R to 3R. What is the energy required

• GMm/12R²

• GMm/6R

• GMm/8R

• GMm/3R²

Choose the factor on which the orbital velocity does not depend when the satellite is orbiting close to the earth’s surface

• The mass of the earth

  
  

• The mass of the satellite

• The orbital radius

• The radius of the earth

If a satellite takes time T for revolution, the the kinetic energy is proportional to

• 1/T

• T^2/3

• 1/T²

• 1/T³

The atmosphere around the earth is held by

• Gravity

  
  

• Winds

• Clouds

• None of the above

If the distance between the earth and the sun were half its present value, the number of days in a year would have been

• 64.5

• 129

• 182.5

• 730

The mass of a spaceship is 1000 kg. It is to be launched from the earth’s surface out into free space. The value of ‘g’ and ‘R’ (radius of the earth) is 10 m/s² and 6400 km respectively. The required energy for this work will be

• 6.4 x 10¹⁰ Joules

  
  

• 6.4 x 10¹¹ Joules

• 6.4 x 10⁸ Joules

• 6.4 x 10⁹ Joules