NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1. 'Parsec' is the unit of'
  • time

  • distance

  • frequency

  • angular acceleration



In the figure, the position-time graph of a particle of mass 0.1 kg is shown. The impulse at t = 2 sec is


  • 0.2 kg m sec-1

  • - 0.2 kg m sec-1

  • 0.1 kg m sec-1

  • - 0.4 kg m sec-1


0.2 kg m sec-1

Velocity between t = 0 and t = 2 sec

Impulse = change in momentum 

             = m Δv

              = m xt

               = 0.1 × 4 - 02 - 0

 Impulse = 0.2 kg m sec-1


The pressure exerted by an electromagnetic wave of intensity I ( watt/m2 ) on a nonreflecting surface is [ c is the velocity of light ]

  • Ic

  • Ic2

  • I/c

  • I/c2


A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/sec. It is subjected to a retarding force F = -0.1 x joule/meter during its travel from x = 20 meter to x = 30 meter. Its final kinetic energy will be

  • 475 joule

  • 450 joule

  • 275 joule

  • 250 joule


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 ]

  • 2 Gmr12  c

  • 2 gmr12 = c

  • 2 Gmr12   c

  • gmr12  c


When a ball is thrown up vertically with velocity  vo, it reaches a maximum height of h. If one wishes triple the maximum height then the ball should be thrown with velocity

  • 3 vo

  • 3vo

  • 9vo

  • 3/2 vo


A solid sphere is rolling on a frictionless surface, show in figure with a translational velocity v m/s. If it is to climb the inclined surface then v should be

  • ≥ 107gh

  • ≥ 2gh

  • 2gh

  • 10/7 gh


A horizontal platform is rotating with uniform angular velocity around the vertical axis passing through its centre. At some instant of time a viscous fluid of mass 'm' is dropped at the centre and is allowed to spread out and finally fall. The angular velocity during this period

  • decreases continuously

  • decreases initially and increases again

  • remains unaltered

  • increases continuously


A ladder is leaned against a smooth wall and  it is allowed to slip on a frictionless floor. Which figure represents trace of its centre of mass.


A person is standing in an elevator. In which situation he finds his weight less?

  • When the elevator moves upward with constant acceleration

  • When the elevator moves downward with constant acceleration

  • When the elevator moves upward with uniform velocity

  • When the elevator moves downward with uniform velocity