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A tuning fork arrangement (pair) produces 4 beats / sec with one fork of frequency 288 cps . A little wax is placed on the unknown fork and it then produces 2 beats /sec. The frequency of the unknown fork is

Options

  1. A286 cps
  2. B292 cps
  3. C294 cps
  4. D288 cps

Correct answer

B. 292 cps

Step-by-step solution

The fact that placing wax decreases the frequency of the unknown fork and also the beat frequency states that the unknown fork is of higher frequency. n-288=4 n=292 cps

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