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PHYSICS MCQs

Total Questions : 3767 | Page 31 of 377 pages
Question 301. The speed of sound travel fastest through
  1.    Liquid
  2.    Solid
  3.    Gas
  4.    None of the above
 Discuss Question
Answer: Option B. -> Solid
Question 302. Compressions and Rarefactions are characteristic of
  1.    Longitudinal waves
  2.    Transverse waves
  3.    Both A & B
  4.    Neither of A & B
 Discuss Question
Answer: Option A. -> Longitudinal waves
Question 303. Least audible sound for most of the human ear is :
  1.    10.0 µ bar
  2.    0.0002 µ bar
  3.    0.005 µ bar
  4.    5.0 µ bar
 Discuss Question
Answer: Option B. -> 0.0002 µ bar
Question 304. Hertz is a unit for measuring
  1.    Intensity of waves
  2.    Frequency of waves
  3.    Wavelength
  4.    Clarity of waves
 Discuss Question
Answer: Option B. -> Frequency of waves
Question 305. Hertz is the SI unit of
  1.    Weight
  2.    Power
  3.    Pressure
  4.    Frequency
 Discuss Question
Answer: Option D. -> Frequency
Question 306. The velocity of the sound is highest in
  1.    Metal
  2.    Air
  3.    Water
  4.    Vacuum
 Discuss Question
Answer: Option A. -> Metal
Question 307. The ordinary and maximum tolerance limit of sound by human being is
  1.    50 db to 70 db (decibel)
  2.    60 db to 80 db (decibel)
  3.    65 db to 75 db (decibel)
  4.    70 db to 85 db (decibel)
 Discuss Question
Answer: Option B. -> 60 db to 80 db (decibel)
Question 308. In SONAR which kind of wave is used?
  1.    Infrasonic
  2.    Ultrasonic
  3.    Radio
  4.    Audible sound
 Discuss Question
Answer: Option B. -> Ultrasonic
Question 309. Sound waves cannot travel through
  1.    Gas
  2.    Liquid
  3.    Vacuum
  4.    Solid
 Discuss Question
Answer: Option C. -> Vacuum
Question 310. Noise is measured in
  1.    Watt
  2.    REM
  3.    Centigrade
  4.    Decibel
 Discuss Question
Answer: Option D. -> Decibel

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