Home
Class 12
PHYSICS
Select the correct alternative-...

Select the correct alternative-

A

The gravitational field inside a sperical cavity, within a spherical planet must be non zero and uniform.

B

When a body is projected horizontally at an appreciable large height above the earth, with a velocity less than for a circular orbit, it will fall to the earth along a parabolic path.

C

A body of zero total mechanical energy placed in a gravitational field will escape the field

D

earth's satellite must be in equatorial plane

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    ALLEN|Exercise Exercise 3 (Miscellaneous Type Questions)|20 Videos

  • GRAVITATION

    ALLEN|Exercise Exercise 4 A (Conceptual Subjective Exercise)|14 Videos

  • GRAVITATION

    ALLEN|Exercise Exercise 1 (Check your Grasp)|28 Videos

  • GEOMETRICAL OPTICS

    ALLEN|Exercise subjective|14 Videos

  • KINEMATICS-2D

    ALLEN|Exercise Exercise (O-2)|46 Videos

Similar Questions

Explore conceptually related problems

Figure shows three concentric conducting spherical shells of radii a,b and c (c gt b gt a) . The innermost and outermost shell are given charge s Q_(1) and Q_(2) respectively, and the middle shell had been earthed. Select the correct alternative(s) .

A girl throws the ball with horizontal velocity 2m//s at the moment t=0 . The ball bounces once on the smooth floor and then lands into cup C . The coefficient of restitution for the collision is 0.8 . Select the correct alternative (g=10m//s^(2))

A battery of emf E and internal resistance r is connected across a resistance R. Resistance R can be adjusted to any value greater then or equla to zero. A graph is plotted between the current passing through the resistance (I) and potential (V) across it. Select the correct alternatives.

A short electric dipoleis placed along y-axis at the origin. The electric field vector at a point P on x-axis is vec(E ) _(1) . The dipole is rotated by ( pi)/(2) at its positin . Now, the electric field vector at point P is vec(E )_(2) . Select the correct alternative(s) :

Two blocks of masses 4 kg and 2sqrt(3) kg are placed on fixed smooth wedge . They are connected by means of a massless inextensible string that passes over the pulley/ The angle of inclinations are 30^(@) and 60^(@) as shown in figure . Select the correct alternative ( g = 10 m//s^(2))

Figure shows a container of width H. A telescope is fitted at a height H above the base on its side wall such that it is focussed at the point A as shown. Now a liquid is poured slowly in the container. The refractive index of liquid is mu = sqrt(2) . Select the correct alternatives

A particle constrained to move along x-axis given a velocity u along the positive x-axis. The acceleration ' a ' of the particle varies as a = - bx, where b is a positive constant and x is the x co-ordinate of the position of the particle . Then select the correct alternative(s): .

Complete the following statements by selecting the correct alternative from the choices given : Purification of aluminium by electrolytic refining is called :

Complete the statement by selecting the correct alternative from the choices given: Introducing a halogen atom into an alkene can generally reduce its

Complete the following statements by selecting the correct alternative from the choices given : In the dehydration of alcohols to alkenes by heating with concentrated sulphuric acid, the initiation step is :

ALLEN-GRAVITATION-Exercise 2 (Brain Teasers)
  1. There is a concentric hole of radius R in a solid sphere of radius 2R ...

    Text Solution

    |

  2. If there were a reduction in gravitational effect which of the followi...

    Text Solution

    |

  3. Select the correct alternative-

    Text Solution

    |

  4. A particle of mass M is at a distance a from surface of a thin spheric...

    Text Solution

    |

  5. Three particles are projected vertically upward from a point on the su...

    Text Solution

    |

  6. When a satellite in a circular orbit around the earth enters the atmos...

    Text Solution

    |

  7. A satellite is to be geo-stationary, which of the following are essent...

    Text Solution

    |

  8. A cavity of the radius R//2 is made inside a solid sphere of radius R....

    Text Solution

    |

  9. A tunnel is dug along a chord of the earth at a perpendicular distance...

    Text Solution

    |

  10. A double star consists of two stars having masses M and 2M. The distan...

    Text Solution

    |

  11. A solid sphere of uniform density and radius 4 units is located with i...

    Text Solution

    |

  12. The magnitude of the gravitational field at distance r(1) and r(2) fro...

    Text Solution

    |

  13. Mark the correct statement/s-:

    Text Solution

    |

  14. If λm for the moon is 14.5 micron ,then find its temperature.

    Text Solution

    |

  15. Suppose a smooth tunnel is dug along a straight line joining two point...

    Text Solution

    |

  16. A small ball of mass 'm' is released at a height 'R' above the earth s...

    Text Solution

    |

  17. A particle of mass m was transferred from the centre of the base of a ...

    Text Solution

    |

  18. If d is the distance between the centre of the earth of mass M(1) and ...

    Text Solution

    |

  19. A planet is revolving around the Sun in an elliptical orbit. Its close...

    Text Solution

    |

  20. A satellite is in a circular orbit very close to the surface of a plan...

    Text Solution

    |