Physics Practice MCQ Page 41

Multiple Choice questions for Physics in the sets of 10 each on one page with questions and answers. All sets are useful in the preparation of subject tests for employment or admission.
Question: 3946   Consider the following statements Assertion (A):The moment of inertia of a rigid body reduces to its minimum value, when the axis of rotation passes through its centre of gravity Reason (R): The weight of a rigid body always acts through its centre of gravity of these statement
  1. both A and R are true and R is the correct explanation of A
  2. both A and R are true but R is not a correct explanation of A
  3. a is true but R is false
  4. A is false but r is true
Question: 3947   a 10 kg body has a kinetic energy of 500 joules its momentum will be
  1. 25 kg-m/s
  2. 50 kg-m/s
  3. 100 kg-m/s
  4. 250 kg-m/s
Question: 3948   a ball whose momentum is p strikes a wall at right angle and bounces off. The change in the momentum of the ball will be
  1. 0
  2. p/2
  3. p
  4. 2p
Question: 3949   At case of friction between two bodies
  1. rolling friction> static friction> kinetic friction
  2. static friction
  3. kinetic friction>rolling friction>static friction
  4. static friction>kinetic friction> rolling friction
Question: 3950   At the turning point of an oscillator, its potential energy is equal to
  1. zero
  2. its total energy
  3. its kinetic energy
  4. twice its kinetic energy
Question: 3951   The escape velocity on the surface of the earth is vo. If m and R are the mass and radius of the earth respectively, then the escape velocity on another planet of mass 2M and radius R/2 will be
  1. 4 v0
  2. 2 v0
  3. v0
  4. v0/2
Question: 3952   At the turning point of an oscillator, its potential energy is equal to
  1. zero
  2. its total energy
  3. its kinetic energy
  4. twice its kinetic energy
Question: 3953   An electrons is moving in the positive X' direction in in S' frame.The relative velocity between the S and S' frames is 0.8c and the velocity of the electron is also 0.8c with respect to an o9bservere in S' frame. The velocity of the electron for an observer in the s frame is
  1. 1.6c
  2. 1.0c
  3. 0.975c
  4. 0.875c
Question: 3954   Water flows through a horizontal pipeline of varying cross-section at the rate of 0.3 m3/s. The velocity of water (in m/s) at a point of area of cross-section 0.03m2 will be
  1. 0.09
  2. 3.00
  3. 9.00
  4. 10.00
Question: 3955   A capillary tube of length less than the "capillary height" for a given liquid is dipped in that liquid. The the liquid will
  1. overflow
  2. rise to the top and bugle out
  3. rise to the top and the curvature of the menicus will decrease
  4. not rise to the top
Question: 3956   Bernouli's principle which is applicable to a fluid in motion. corresponds to the principle of conservation of
  1. linear momentum
  2. energy
  3. mass
  4. angular momentum
Question: 3957   A capillary tube of length less than the "capillary height" for a given liquid is dipped in that liquid. The the liquid will
  1. overflow
  2. rise to the top and bugle out
  3. rise to the top and the curvature of the menicus will decrease
  4. not rise to the top

Answers to the questions of Physics on this page

Following list gives the correct choice for the answer of the Physics mcqs.
3946 . A       3947 . C       3948 . A       3949 . D       3950 . B       3951 . D       3952 . B       3953 . C       3954 . D       3955 . C       3956 . B       3957 . C      

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