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NEET Sample Paper NEET Sample Test Paper-58

  • question_answer
    The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lie below 1250 Hz are: (velocity of sound = 340 m/s)

    A) 4                                 

    B) 5       

    C) 7                                 

    D) 6

    Correct Answer: D

    Solution :

    [d] In a closed pipe Fundamental frequency \[({{f}_{{}^\circ }})=\frac{v}{4L}\] \[=\frac{340\times 100}{4\times 85}=100Hz\] In a closed pipe, only odd frequency produced 100Hz, 300Hz, 500Hz, 700Hz, 900Hz, 1100Hz.


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