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PHYSICS MCQs

Total Questions : 3767 | Page 11 of 377 pages
Question 101. Which planet has the lowest density?
  1.    Earth
  2.    Jupiter
  3.    Saturn
  4.    Neptune
 Discuss Question
Answer: Option C. -> Saturn
Question 102. The sensation of weightlessness in a spacecraft in an orbit is due to the
  1.    Absence of gravity outside
  2.    Acceleration in the orbit which is equal to the acceleration due to gravity outside
  3.    Presence of gravity outside but not inside the spacecraft
  4.    Fact that spacecraft in the orbit has no energy
 Discuss Question
Answer: Option B. -> Acceleration in the orbit which is equal to the acceleration due to gravity outside
Question 103. The different colours of different stars are due to the variation of
  1.    Temperature
  2.    Pressure
  3.    Density
  4.    Radiation from them
 Discuss Question
Answer: Option A. -> Temperature
Question 104. In the absence of the earth's atmosphere, sky would appear
  1.    Blue
  2.    Deep red
  3.    White
  4.    Black
 Discuss Question
Answer: Option D. -> Black
Question 105. Which of the following is correct about the properties of Gravitational Forces?
  1.    They are the strongest forces in nature
  2.    They observe inverse square law
  3.    Both a and b
  4.    None
 Discuss Question
Answer: Option B. -> They observe inverse square law
Question 106. We always see the same face of the moon, because
  1.    It is smaller than the earth
  2.    It revolves on its axis in adirection opposite to that ofthe earth
  3.    It takes equal time for revolution around the earth and rotation on its own axis
  4.    It rotates at the same speed as the earth around the sun
 Discuss Question
Answer: Option C. -> It takes equal time for revolution around the earth and rotation on its own axis
Question 107. Stars are held together by
  1.    Gravitational forces
  2.    Electrical forces
  3.    Ionic forces
  4.    Magnetic forces
 Discuss Question
Answer: Option A. -> Gravitational forces
Question 108. The minimum number of geostationary satellites needed for uninterrupted global coverage is :
  1.    3
  2.    2
  3.    4
  4.    1
 Discuss Question
Answer: Option A. -> 3
Question 109. A bomb explodes on the moon. You will hear its sound on earth after ________
  1.    20 minutes
  2.    2 hours 20 minutes
  3.    3.7 hours
  4.    You cannot hear the sound of explosion
 Discuss Question
Answer: Option D. -> You cannot hear the sound of explosion
Question 110. The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by
  1.    Galileo
  2.    Martin Luther
  3.    Johannes Kepler
  4.    Copernicus
 Discuss Question
Answer: Option C. -> Johannes Kepler

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