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PHYSICS MCQs

Total Questions : 3767 | Page 2 of 377 pages
Question 11. Stars appears to move from east to west because
  1.    All stars move from east to west
  2.    The earth rotates from west to east
  3.    The earth rotates from east to west
  4.    The background of the stars moves from west to east
 Discuss Question
Answer: Option B. -> The earth rotates from west to east
Question 12. Pa(Pascal) is the unit for
  1.    Thrust
  2.    Pressure
  3.    Frequency
  4.    Conductivity
 Discuss Question
Answer: Option B. -> Pressure
Question 13. Planets do not twinkle because
  1.    They emit light of a constant intensity
  2.    Their distance from the earth does not change with time
  3.    They are very far away from the earth resulting in decrease in intensity of light
  4.    They are nearer to earth and hence we receive a greater amount of light.
 Discuss Question
Answer: Option D. -> They are nearer to earth and hence we receive a greater amount of light.
Question 14. Metals are good conductors of electricity because:
  1.    They contain free electrons.
  2.    The atoms are lightly packed.
  3.    They have high melting point.
  4.    All of the above.
 Discuss Question
Answer: Option A. -> They contain free electrons.
Question 15. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water
  1.    will overflow
  2.    will not rise
  3.    depressed
  4.    change its meniscus
 Discuss Question
Answer: Option B. -> will not rise
Question 16. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
  1.    Pressure and Young's modules
  2.    Planck's constant and Angular momentum
  3.    Impulse and moment of force
  4.    Force and rate of change of linear momentum
 Discuss Question
Answer: Option C. -> Impulse and moment of force
Question 17. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:
  1.    Velocity
  2.    Momentum
  3.    Acceleration
  4.    Kinetic energy
 Discuss Question
Answer: Option B. -> Momentum
Question 18. Pick out the scalar quantity
  1.    Force
  2.    Pressure
  3.    Velocity
  4.    Acceleration
 Discuss Question
Answer: Option B. -> Pressure
Question 19. Rectifiers are used to convert:
  1.    Direct current to Alternating current
  2.    Alternating current to Direct current
  3.    High voltage to low voltage
  4.    Low voltage to high voltage
 Discuss Question
Answer: Option B. -> Alternating current to Direct current
Question 20. Out of the following, which is not emitted by radioactive substance?
  1.    Electrons
  2.    Electromagnetic radiations
  3.    Alpha particles
  4.    Neutrons
 Discuss Question
Answer: Option D. -> Neutrons

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