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The condition for a uniform spherical ma...

The condition for a uniform spherical mass m of radius r to be a black hole is .....
(G = gravitational constant and g = acceleration due to gravity)

A

`((GM)/r)^(1/2) leC`

B

`((2gm)/r)^(1/2) =c`

C

`((2GM)/r)^(1/2) gec`

D

`((gm)/r)^(1/2) ge c`

Text Solution

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The correct Answer is:
A
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KUMAR PRAKASHAN-GRAVITATION-Section - E Multiple Choice Questions (MCQs)
  1. If v0 be the orbital velocity of a satellite in a circular orbit clos...

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  2. The motion of planet in the solar system is an example of the conserva...

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  3. The condition for a uniform spherical mass m of radius r to be a black...

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  4. The force of gravitation is .........

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  5. Geo-stationary satellite is at …... height from surface of Earth.

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  6. Which of the following statement is true?

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  7. The mass and diameter of a planet have twice the value of the correspo...

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  8. The value of g at a particular point is 9.8 m//s^2 Suppose the earth s...

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  9. Let g be the acceleration due to gravity at earth's surface and K be t...

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  10. If the angular speed of earth increases two times then the acceleratio...

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  11. The relation between acceleration of gravity at pole and at an equator...

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  12. If the mass of earth is M, radius R and G is universal gravitational c...

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  13. The density of a planet is rho The orbital period of a satellite revo...

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  14. The escape velocity from the surface of earth is ve . The escape veloc...

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  15. A body weight 72 N moves from the surface of earth at a height half of...

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  16. The radius of the earth is 4 times that of the moon and its mass is 80...

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  17. Two spherical bodies of mass M and 5 M and radii R and 2R repectively ...

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  18. Suppose the gravitational force varies inversely  as the nth power of ...

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  19. A satellite of mass m revolves around the earth of radius R at a heigh...

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  20. A particle of mass 10 g is kept of the surface of a uniform sphere of ...

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