Self Studies

Waves Test - 24...

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  • Question 1
    1 / -0

    A 40 cm40\ cm long brass rod is dropped, one end first on to a hard floor but it is caught before it topples over. With an oscilloscope it is determined that the impact produces a 3 kHz3\ kHz tone. The speed of sound in brass is:

  • Question 2
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    When a sound wave of wavelength λ\lambda  is propagating in a medium the maximum velocity of the particle is equal to wave velocity. The amplitude of the wave is 

  • Question 3
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    A wave travelling in positive X-direction with A = 0.2 m velocity = 360 m/s and λ\lambda= 60 m, then correct expression for the wave is : -

  • Question 4
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    A particle starts from a point PP at a distance of A/2A/2 from the mean position OO & travels towards left as shown in the figure. If the time period of SHM, executed about OO is TT and amplitude AA then the equation of motion of particle is :

  • Question 5
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    A small mass executes linear SHM about O with amplitude a and period T. Its displacement from O attime T/8 after passing through O is:

  • Question 6
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    Assertion :If Amplitude of SHM is doubled, the periodicity wall remain same.
    Reason :Amplitude and periodicity are two independent characteristics of SHM.

  • Question 7
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    Statement-1 : Superposition principle is applicable only for small disturbances.
    Statement-2 : Superposition principle is applicable only for non-linear waves.

  • Question 8
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    The amplitude of the vibrating particle due to superposition of two SHMsSHMs,
    y1=sin(ωt+π3)y_{1}= \sin \left ( \omega t+\dfrac{\pi }{3} \right ) and y=2sinωty=2 \sin \omega t is:

  • Question 9
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    When a wave pulse travelling in a string is reflected from a rigid wall to which string is tied as shown in figure. For this situation two statements are given below.
    (1) The reflected pulse will be in same orientation of incident pulse due to a phase change of π\pi radians
    (2) During reflection the wall exert a force on string in upward direction
    For the above given two statements choose the correct option given below.

  • Question 10
    1 / -0

    Two identical pulses move in opposite directions with same uniform speeds on a stretched string. The width and kinetic energy of each pulse is LL and kk respectively. At the instant they completely overlap, the kinetic energy of the width LL of the string where they overlap is

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