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PHYSICS MCQs

Total Questions : 3767 | Page 27 of 377 pages
Question 261. Rotameter is used to measure
  1.    Vortex flow
  2.    Density of fluids
  3.    Velocity of fluid in pipes
  4.    Flow of fluids
 Discuss Question
Answer: Option D. -> Flow of fluids
Question 262. Siphon will fail to work if
  1.    The level of the liquid in the two vessels are at the same height
  2.    The temperature of the liquids in the two vessels are the same
  3.    The densities of the liquid in the two vessels are equal
  4.    Both its limbs are of unequal length
 Discuss Question
Answer: Option A. -> The level of the liquid in the two vessels are at the same height
Question 263. A drop of liquid assumes spherical shape because:
  1.    Intermolecular forces are strong in liquids
  2.    A sphere has the least surface area for a given volume
  3.    A sphere has the largest surface area for a given volume
  4.    Inter molecular forces are weak in liquids
 Discuss Question
Answer: Option B. -> A sphere has the least surface area for a given volume
Question 264. Sprayer functions on
  1.    Bernouli's principle
  2.    Archemede's principle
  3.    Pascal's law
  4.    Floatation principle
 Discuss Question
Answer: Option A. -> Bernouli's principle
Question 265. A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?
  1.    The liquid surface falls down on the direction of motion and rises up on the back side of the tank
  2.    The liquid surface falls down only at the center of the tank
  3.    The surface of the liquid remains horizontal
  4.    None
 Discuss Question
Answer: Option A. -> The liquid surface falls down on the direction of motion and rises up on the back side of the tank
Question 266. Which of the following instrument is used to measure Soil Water Tension?
  1.    Photometer
  2.    Pyrometer
  3.    Psychrometer
  4.    Tensiometer
 Discuss Question
Answer: Option D. -> Tensiometer
Question 267. The lift of an aeroplane is caused by
  1.    Law of gravitation
  2.    Theorem of continuity
  3.    Pascel's law
  4.    Bernouli's theorem
 Discuss Question
Answer: Option D. -> Bernouli's theorem
Question 268. Name the process by which bubbles from liquid are formed?
  1.    Effervescence
  2.    Surface Tension
  3.    Surface Energy
  4.    Degasification
 Discuss Question
Answer: Option A. -> Effervescence
Question 269. Blotting paper absorbs ink due to
  1.    Capillary action phenomenon
  2.    Diffusion of ink through the blotting
  3.    Siphon action
  4.    Viscosity of ink
 Discuss Question
Answer: Option A. -> Capillary action phenomenon
Question 270. Ball pen functions on the principle of :
  1.    Viscosity
  2.    Boyle's Law
  3.    Gravitational force
  4.    Surface tension
 Discuss Question
Answer: Option D. -> Surface tension

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