A stretched wire vibrates with a frequency of 80 H z when the tension is T 1 and frequency of 150 H z when the tension is T 2 . When the tension is T 1 + T 2 , its frequency of vibration is (in Hz)

Option 1 -

170

Option 2 -

230   

Option 3 -

240

Option 4 -

210

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    a month ago
    Correct Option - 1


    Detailed Solution:

    Frequency in the stretched wire is

    f = 1 2 l T μ

    f 1 2 = T 1 4 μ l 2

    f 2 2 = T 2 4 μ l 2

    T 1 + T 2 4 μ l 2 = f 2

    f 2 = f 1 2 + f 1 2

    f = 80 2 + 150 2 = 170 H z

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