Subject

Physics

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

A block of mass m is in contact with the cart C as shown in the figure


The coefficient of static friction between the block and the cart is μ. The acceleration α of the cart that will prevent the block from falling satisfies

  • straight alpha space greater than mg over straight mu
  • straight alpha space greater than space straight g over μm
  • straight alpha space greater or equal than space straight g over straight mu
  • straight alpha space greater or equal than space straight g over straight mu
2195 Views

2.

A circular disk of moment of inertia It is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed.straight omega subscript straight i Another disk of moment of inertia Ib is dropped coaxially onto the rotating disk. Initially, the second disk has zero angular speed. Eventually, both the disks rotate with constant angular speed.straight omega subscript straight fThe energy lost by the initially rotating disc due to friction is 

  • 1 half fraction numerator straight I subscript straight b superscript 2 over denominator left parenthesis straight I subscript straight t plus straight I subscript straight b right parenthesis end fraction space straight omega subscript straight i superscript 2
  • 1 half fraction numerator straight I subscript straight t superscript 2 over denominator left parenthesis straight I subscript straight t plus straight I subscript straight b right parenthesis end fraction straight omega subscript straight i superscript 2
  • 1 half fraction numerator straight I subscript straight b minus straight I subscript straight t over denominator left parenthesis straight I subscript straight t plus straight I subscript straight b right parenthesis end fraction straight omega subscript straight i superscript 2
  • 1 half fraction numerator straight I subscript straight b minus straight I subscript straight t over denominator left parenthesis straight I subscript straight t plus straight I subscript straight b right parenthesis end fraction straight omega subscript straight i superscript 2
1923 Views

3.

The radii of circular orbits of two satellites A and B of the earth are 4R and R, respectively. If the speed of satellite A is 3v. then the speed of satellite B will be

  • 3v/4

  • 6v

  • 12 v

  • 12 v

1142 Views

4.

A ball is dropped from  a high-rise platform at t=0 starting from rest. After 6s another ball is thrown downwards from the same platform with a speed v. The two balls meet at t= 18s. What is the value of v? (take g= 10 ms-2)

  • 74 ms-2

  • 55 ms-1

  • 40 ms-1

  • 40 ms-1

1022 Views

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5.

A ball moving with velocity 2 ms-1 collides head on with another stationary ball of double the mass. If the coefficient of restitution is 0.5, then their velocities (in ms-1) after collision will be

  • 0,1

  • 1,1

  • 1,0.5

  • 1,0.5

1744 Views

6.

A Particle has initial velocity andleft parenthesis 3 space bold i with bold hat on top space plus 4 space bold j with bold hat on top right parenthesis has acceleration.left parenthesis 0.1 space bold i with bold hat on top space plus space 0.3 space bold j with bold hat on top right parenthesis Its speed after 10s is

  • 7 unit

  • 7 square root of 2 unit
  • 8.5 unit

  • 8.5 unit

339 Views

7.

An engine pumps water through a hosepipe. Water passes through the pipe and leaves it with a velocity of 2 ms-1. The mass per unit length of water in the pipe is 100 kgm-1. What is the power of the engine?

  • 400 W

  • 200 W

  • 100 W

  • 100 W

1282 Views

8.

Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and hs high melting point?

  • metallic bonding

  • van der Waal's bonding

  • Ionic bonding

  • Ionic bonding

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9.

A particle moves a distance x in time t according to equation x  = (t +5)-1. The acceleration of particle is proportional to

  • (velocity)3/2

  • (distance)2

  • (distance)-2

  • (distance)-2

591 Views

10.

Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be

  • 2v

  • 0

  • 1.5 v

  • 1.5 v

486 Views

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