EWT | Academic Question

Questions
Question (1)
QN0035468

The total energy of a circularly orbiting satellite is

  • (A)

    twice the kinetic energy of the satellite

  • (B)

    half the kinetic energy of the satellite

  • (C)

    twice the potential energy of the satellite

  • (D)

    half the potential energy of the satellite

Correct Answer: D
Explanation:

Total energy of satellite is half the potential energy i.e.,

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Question (2)
QN0035469

Two satellites,  and , have masses  and  respectively.  is in a circular orbit of radius , and  is in a circular orbit of radius  around the earth. The ratio of their kinetic energies, , is :

  • (A)

             

  • (B)

    1

  • (C)

    2

  • (D)

Correct Answer: B
Explanation:

Orbital, velocity,

Kinetic energy of satellite ,

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Question (3)
QN0035470

Two satellites  and  having masses in the ratio  are revolving in circular orbits of radii  and  respectively around the earth. The ratio of total mechanical energy of  to  is:    

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

Kinetic energy of satellite ,

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Question (4)
QN0035471

For a satellite moving in an orbit around the earth, the ratio of kinetic energy to potential energy is

  • (A)

             

  • (B)

  • (C)

    2

  • (D)

Correct Answer: A
Explanation:

As,

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Question (5)
QN0035472

A satellite revolves around the earth of radius  in a circular orbit of radius . The percentage increase in energy required to lift it to an orbit of radius  is

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

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