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PHYSICS MCQs

Total Questions : 3767 | Page 73 of 377 pages
Question 721. Shock-absorbers are usually made of steel as it :
  1.    Is not brittle
  2.    Has lower elasticity
  3.    Has higher elasticity
  4.    Has no ductile property
 Discuss Question
Answer: Option C. -> Has higher elasticity
Question 722. Which of the following devices can be used to detect radiant heat ?
  1.    Liquid thermometer
  2.    Six's maximum and minimum thermometer
  3.    Constant volume air thermometer
  4.    Thermopile
 Discuss Question
Answer: Option D. -> Thermopile
Question 723. The dimensional formula ML–1T–2 corresponds to
  1.    Modulus of elasticity
  2.    Viscosity
  3.    Moment of a force
  4.    Thrust
 Discuss Question
Answer: Option A. -> Modulus of elasticity
Question 724. Amount of water vapour (gaseous) in a given volume of air (cubic metre) is known as:
  1.    Mixing ratio
  2.    Relative humidity
  3.    Absolute humidity
  4.    Specific humidity
 Discuss Question
Answer: Option C. -> Absolute humidity
Question 725. An ideal gas cannot be
  1.    Liquified
  2.    Solidified
  3.    Both A & B
  4.    None of the above
 Discuss Question
Answer: Option A. -> Liquified
Question 726. Super cooling stands for cooling of a liquid :
  1.    At freezing point
  2.    Below freezing point
  3.    At melting point
  4.    Above melting point
 Discuss Question
Answer: Option B. -> Below freezing point
Question 727. The spring constant of a spring depends on its
  1.    Length only
  2.    Material only
  3.    Length and its diameter
  4.    Thickness, its diameter and its material
 Discuss Question
Answer: Option D. -> Thickness, its diameter and its material
Question 728. The average kinetic energy of the molecules of an ideal gas is directly proportional to
  1.    Velocity of Molecules
  2.    Mass of Molecules
  3.    Absolute temperature of the gas
  4.    Temperature of environment
 Discuss Question
Answer: Option C. -> Absolute temperature of the gas
Question 729. Steel is more elastic than rubber because it :
  1.    Requires larger deforming force
  2.    Is never deformed
  3.    Is deformed very easily
  4.    Is harder than rubber
 Discuss Question
Answer: Option C. -> Is deformed very easily
Question 730. Water will not be vapourised if
  1.    The temperature is 0°C
  2.    The humidity is 0%
  3.    The humidity is 100%
  4.    The temperature is 100°C
 Discuss Question
Answer: Option C. -> The humidity is 100%

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