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JEE Main & Advanced Physics Wave Mechanics Question Bank Vibration of String

  • question_answer
    If you set up the seventh harmonic on a string fixed at both ends, how many nodes and antinodes are set up in it [AMU 2000]

    A)            8, 7

    B)            7, 7

    C)            8, 9

    D)            9, 8

    Correct Answer: A

    Solution :

                         String will vibrate in 7 loops so it will have 8 nodes 7 antinodes. Number of harmonics = Number of loops = Number of antinodes Þ Number of antinodes = 7  Hence number of nodes = Number of antinodes + 1                                        \[=7+1=8\]


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