Subject

Physics

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

In an experiment, four quantities a,b, c and d are measured with percentage error 1%, 2%, 3% and 4% respectively. Quantity P is calculated as follows:

P = fraction numerator straight a cubed straight b squared over denominator cd end fraction space percent sign, error in P is

  • 14 %

  • 10 %

  • 7 %

  • 7 %

3312 Views

2.

The velocity of a projectile at the initial point A is (2 i + 3 j) m/s. Its velocity (in m/s) at point B is,

  • -2 i - 3 j

  • -2 i + 3 j

  • i - 3 j

  • i - 3 j

2149 Views

3.

A stone falls freely under gravity. It covers distances h1 , h2 and h3 in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relations between h1, h2 and h3 is,

  • h1 = 2 h2 = 3 h3

  • h1straight h subscript 2 over 3 space equals space h subscript 3 over 5

  • h2 = 3 h1 and h3 = 3 h2

  • h2 = 3 h1 and h3 = 3 h2

1524 Views

4.

Three blocks will masses m, 2m and 3m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2m? (g is the acceleration due to gravity)

  • zero

  • 2 mg

  • 3 mg

  • 3 mg

3806 Views

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5.

The upper half of an inclined plane of the inclination straight theta is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by,

  • straight mu space equals space fraction numerator 1 over denominator tan space straight theta end fraction
  • straight mu space equals space fraction numerator 2 over denominator tan space straight theta end fraction
  • straight mu space equals space 2 space tan space straight theta
  • straight mu space equals space 2 space tan space straight theta
1969 Views

6.

A uniform force of (3 j) N acts on a particle of mass 2 kg. Hence the particle is displaced from position (2 k) m to position ( 4 + 3 k) m. The work done by the force on the particle is,

  • 9 J

  • 6 J

  • 13 J

  • 13 J

1425 Views

7.

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 m/s and the second part of mass 2 kg moves with second part of mass 2 kg moves with 8 m/s speed. If the third part flies off with 4 m/s speed, then its mass is,

  • 3 kg

  • 5 kg

  • 7 kg

  • 7 kg

2449 Views

8.

A rod PQ of mass M and length L is hinged at end P. The rod is kept horizontal by a massless string tied to point Q as shown in the figure. When a string is cut, the initial angular acceleration of the rod is,

  • 3g / 2L

  • g/L

  • 2g/L

  • 2g/L

3795 Views

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9.

A small object of uniform density rolls up a curved surface with an initial velocity v'. It reaches up to a maximum height of fraction numerator 3 straight v squared over denominator 4 straight g end fraction with respect to the initial position. The object is,

  • ring

  • solid sphere

  • hollow sphere

  • hollow sphere

1505 Views

10.

A body of mass m taken from the earth's surface to the height equal to twice the radius (R) of the earth. The change in potential energy of the body will be

  • mg2R

  • 2/3 mgR

  • 3 mgR

  • 3 mgR

6445 Views

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