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A tuning fork of known frequency 256 ~Hz makes 5 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

Options

  1. A256+2 ~Hz
  2. B256-2 ~Hz
  3. C256-5 ~Hz
  4. D256+5 ~Hz

Correct answer

A. 256+2 ~Hz

Step-by-step solution

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