Hubble s law is related with from Physics NEET Year 2002 Free So

Subject

Physics

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The dimension of torque is

  • [ M L-2 ]

  • [ M L-1 T-1 ]

  • [ M L2 T-2 ]

  • [ M L3 T-3 ]


2.

If vectors  P = ai^ + aj^ + 3k^  and  Q = ai^ - 2j^ - k^ are perpendicular to each other, then the positive value of  a  is

  • 3

  • 1

  • 2

  • 0


3.

Three different objects  m, m2 and  m3 to fall from rest and from the same point O along three different frictionless paths. The speeds of the three objects, on reaching the ground, will be in the ratio of

  • m1 : m2 : m3

  • 1 : 1 : 1

  • m1 : 2 m: 3m3

  • 1m1 : 1m2 : 1m3


4.

A particle starts from rest and has an acceleration  of 2 m/s2 for  10 sec. After that, it travels for 30 sec with constant speed and then undergoes a retardation of 4 m/s2  and comes back to rest. The total distance covered by the particle is

  • 650 m

  • 750 m

  • 700 m

  • 800 m


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5.

Hubble's law is related with

  • comet

  • speed of galaxy

  • black hole

  • planetary motion


B.

speed of galaxy

Recessional velocity = Hubble's  constant times distance

        V = Ho D

where 

V is the observed velocity of the galaxy away from us usually in km/sec

H is Hubble's constant in km/sec/Mpc

D is the distance to the galaxy in Mpc

The Hubble's law is related with the speed of the galaxy.


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6.

At the uppermost point of a projectile, its velocity and acceleration are at an angle of

  • 0°

  • 90°

  • 45°

  • 180°


7.

The kinetic energy of a body becomes four times its initial value. The new linear momentum will be

  • same as the initial value

  • four times the initial value

  • twice of the initial value

  • eight times of the initial value


8.

The angular momentum of a moving body remains constant if

  • net external force is applied

  • net external torque is applied

  • net pressure is applied

  • net external torque is not applied


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9.

The force of gravitation is

  • repulsive

  • conservative

  • electrostatic

  • non-conservative


10.

Kepler's second law is based on

  • Newton's first law

  • special theory of relativity

  • Newton's second law

  • Conservation of angular momentum


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