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Waves Test - 60

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Waves Test - 60
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Weekly Quiz Competition
  • Question 1
    4 / -1
    Two vibrating strings of the same material but lengths L and 2L have radii 2r and r respectively. They are stretched under the same tension. Both the strings vibrate in their fundamental modes, the one of length L with frequency n1 and the other with frequency n2. The ratio n1/n2 is given by
    Solution

  • Question 2
    4 / -1
    In a sonometer wire, the tension is maintained by suspending a 50.7 kg mass from the free end of the wire. The suspended mass has a volume of 0.0075 m3. The fundamental frequency of the wire is 260 Hz. If the suspended mass is completely submerged in water, the fundamental frequency will become (take g = 10 ms–2)
    Solution

  • Question 3
    4 / -1
    A string of length 2 m is fixed at both ends. If this string vibrates in its fourth normal mode with a frequency of 500 Hz then the waves would travel on its with a velocity of
    Solution

  • Question 4
    4 / -1
    The fundamental frequency of a sonometer wire is n. If its radius is doubled and its tension becomes half, the material of the wire remains same, the new fundamental frequency will be
    Solution

  • Question 5
    4 / -1
    In an experiment with sonometer a tuning fork of frequency 256 Hz resonates with a length of 25 cm and another tuning fork resonates with a length of 16 cm. Tension of the string remaining constant. The frequency of the second tuning fork is
    Solution

  • Question 6
    4 / -1
    The speed of a wave on a string is 150 m/s when the tension is 120 N. The percentage increase in the tension in order to raise the wave speed by 20% is
    Solution

  • Question 7
    4 / -1
    When the length of the vibrating segment of a sonometer wire is increased by 1% the percentage change in its frequency is
    Solution

  • Question 8
    4 / -1
    A 20 cm long string, having a mass of 1.0 g, is fixed at both the ends. The tension in the string is 0.5 N. The string is set into vibrations using an external vibrator of frequency 100 Hz. Find the separation (in cm) between the successive nodes on the string.
    Solution

  • Question 9
    4 / -1
    On which principle does Sonometer works?
  • Question 10
    4 / -1
    A string vibrates with a frequency of 200 Hz. When its length is doubled and tension is altered, it begins to vibrate with a frequency of 300 Hz. The ratio of the new tension to the original tension is
    Solution

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