1. Tardigrade
  2. Question
  3. Physics
  4. 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

Q. 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

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Solution:


For turning fork, where
frequency of piano
or
When tension is increased the beat frequency decreases to 2 beats per second. If we assume that frequency of piano string is . Then on increasing tension frequency, more than . But it is given that beat frequency decreases, therefore is not post.