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PHYSICS MCQs

Total Questions : 3767 | Page 30 of 377 pages
Question 291. The pitch of sound depends on its
  1.    Frequency
  2.    Intensity
  3.    Velocity
  4.    Amplitude
 Discuss Question
Answer: Option A. -> Frequency
Question 292. Speed of sound is the greatest in :
  1.    Water
  2.    Air
  3.    Glass
  4.    Glycerine
 Discuss Question
Answer: Option C. -> Glass
Question 293. A decibel is
  1.    A musical instrument
  2.    The wavelength of noise
  3.    A musical note
  4.    A measure of sound level
 Discuss Question
Answer: Option D. -> A measure of sound level
Question 294. What apparatus is used to locate a submerged object?
  1.    Radar
  2.    Sonar
  3.    Quasar
  4.    Pulsar
 Discuss Question
Answer: Option B. -> Sonar
Question 295. Sound following a flash of lightning is called
  1.    Stoning
  2.    Bolting
  3.    Thunder
  4.    Cloud clash
 Discuss Question
Answer: Option C. -> Thunder
Question 296. Acceptable noise level for human ear
  1.    > 85 db
  2.    = 85 db
  3.    < 85 db
  4.    None of the above
 Discuss Question
Answer: Option C. -> < 85 db
Question 297. Decibel is a term connected with :
  1.    Air
  2.    Water
  3.    Sound
  4.    Soil
 Discuss Question
Answer: Option C. -> Sound
Question 298. Decibel is the unit used for
  1.    Speed of light
  2.    Intensity of heat
  3.    Intensity of sound
  4.    Radio wave frequency
 Discuss Question
Answer: Option C. -> Intensity of sound
Question 299. The speed of sound in air depends on
  1.    Frequency
  2.    Temperature
  3.    Wavelength
  4.    None of the Above
 Discuss Question
Answer: Option B. -> Temperature
Question 300. The unit of noise pollution (level) is :
  1.    Decibel
  2.    Decimal
  3.    Ppm
  4.    None of these
 Discuss Question
Answer: Option A. -> Decibel

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