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Waves Test - 28

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Waves Test - 28
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  • Question 1
    4 / -1
    Which of the following functions represent a wave ?
  • Question 2
    4 / -1
    A light pointer fixed to one prong of a tunning fork touches a vertical smoked plate. The fork is set into vibration and the plate is allowed to fall freely. Eight complete waves are counted when the plate falls through 10 cm. the frequency of the tunning fork is
    Solution

  • Question 3
    4 / -1
    From a point source, if amplitude of waves at a distance r is A, its amplitude at a distance 2r will be
    Solution

  • Question 4
    4 / -1

    Solution

  • Question 5
    4 / -1
    A sound wave travelling with a vel v in a medium A reaches a point on the interface of medium A and medium B. If the velocity in the medium B be 2 V, then the angle of incidence for total internal reflection of the wave will be
    Solution

  • Question 6
    4 / -1
    The following equations represent progressive transverse waves
    Z1 = A cos ( ωt – KX)
    Z2 = A cos ( ωt + KX)
    Z3 = A cos ( ωt + KY)
    Z4 = A cos ( ωt – KY)
    A stationary wave will be formed by superposing
  • Question 7
    4 / -1

    Solution

  • Question 8
    4 / -1
    The equation of a spherical progressive wave is
  • Question 9
    4 / -1
    A string of length L is stretched by L/20 and speed of transverse wave along it is v. The speed of wave when it is stretched by L/10 will be (assume Hook’s Law is obeyed)
    Solution

  • Question 10
    4 / -1
    A stretched sonometer wire is in unison with a tuning fork. When length of wire is increased by 1%, the number of beats heard per second is 5. then the frequency of the fork is
    Solution

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