MHT CET 2026 Physics question
A set of 14 tuning forks is arranged in a series of increasing frequencies. Each fork produces 'x' beats per second with the preceding fork and the last fork is an octave of the first fork. If the seventh fork has the frequency of 114 Hz, the value of x is
Answer: (C)
Solution
The frequencies form an arithmetic progression with common difference (beat frequency between neighbours). Let the first fork have frequency . Then . The last (14th) fork is an octave of the first: $ + 13x =
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