Daily Updated MCQS

Q:It is possible to distinguish between transverse and longitudinal waves form the property of __________________?

  • (A)refraction
  • (B)polarization
  • (C)interference
  • (D)diffraction
  • The Correct Answer is polarization

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Q:If stretching force T of wire increases, then its frequency __________________?

  • (A)decreases
  • (B)increases
  • (C)remains the same
  • (D)any of above
  • The Correct Answer is increases

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Q:The waves that require a material medium for their propagation are called__________________?

  • (A)matter waves
  • (B)electromagnetic waves
  • (C)carrier waves
  • (D)mechanical waves
  • The Correct Answer is mechanical waves

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Q:Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

  • (A)Dopplers effect
  • (B)Interference of waves
  • (C)Beats phenomena
  • (D)All of them
  • The Correct Answer is Dopplers effect

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Q:The speed of stationary waves in a stretched string are independent of___________________?

  • (A)Number of loopsTension in the string
  • (B)Tension in the string
  • (C)Point where string is plucked
  • (D)both A and C
  • The Correct Answer is Both A & C

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Q:The speed of sound in hydrogen is _____________ time than that in oxygen?

  • (A)Two times
  • (B)Three times
  • (C)Four time
  • (D)Six time
  • The Correct Answer is Four time

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Q:Newton estimated the speed of sound _____________________?

  • (A)281m/sec
  • (B)333m/sec
  • (C)340m/sec
  • (D)all of the above
  • The Correct Answer is 281m/sec

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Q:When the source of sound moves away form a stationary listener then ______________ occurs?

  • (A)an apparent increase in frequency
  • (B)an apparent decrease in frequency
  • (C)an apparent decrease in wavelength
  • (D)no apparent change in frequency
  • The Correct Answer is an apparent decrease in frequency

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Q:Silence zone takes place due to____________________?

  • (A)constructive interference
  • (B)destructive interference
  • (C)beats
  • (D)resonance
  • The Correct Answer is destructive interference

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Q:Ultrasonic have__________________?

  • (A)frequency in the audible range
  • (B)frequency is greater than 20 kHzfreq
  • (C)frequency lower than 20 Hz
  • (D)all of above
  • The Correct Answer is frequency is greater than 20 kHz

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Q:The velocity of sound in air would become double than its velocity at 0°C at temperature ?

  • (A)313°C
  • (B)586°C
  • (C)819°C
  • (D)1172°C
  • The Correct Answer is 819°C

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Q:The velocity of sound is greatest in___________________?

  • (A)Water
  • (B)air
  • (C)copper
  • (D)ammonia
  • The Correct Answer is copper

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Q:Velocity of sound in vacuum is ____________________?

  • (A)332 ms-1
  • (B)320 ms-1
  • (C)zero
  • (D)224 ms-1
  • The Correct Answer is zero

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Q:According to Newton sound travel in air under the conditions of_____________________?

  • (A)adiabatic
  • (B)isothermal
  • (C)isothermal
  • (D)isochoric
  • The Correct Answer is isothermal

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