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  • Answer please! A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano str

A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was 

  • Option 1)

    510 Hz

  • Option 2)

    514 Hz

  • Option 3)

    516 Hz

  • Option 4)

    508 Hz

 

Answers (1)

best_answer

As discussed in

Beat -

A phenomena resuits when two sound wave having equal amplitude and travelling in a medium in the same direction but having slightly different frequency.

-

 

 Frequency of the Piano string = 512\pm4 = 516 or 508 when the tension is increased. Send frequency decreases to 2. It means that frequency of string is 508.


Option 1)

510 Hz

Incorrect

Option 2)

514 Hz

Incorrect

Option 3)

516 Hz

Incorrect

Option 4)

508 Hz

Correct

Posted by

Plabita

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