Questions
25 tuning forks are arranged in series in the order of decreasing frequency. Any two successive forks produce 3 beats/sec. If the frequency of the first tuning fork is the octave of the last fork, then the frequency of the 21st fork is
detailed solution
Correct option is C
According to the question frequencies of first and last tuning forks are 2n and n respectively.Hence frequency in given arrangement are as follows Þ 2n – 24 ´ 3 = n Þ n = 72 Hz So, frequency of 21st tuning fork n21=(2×72−20×3)=84 HzTalk to our academic expert!
Similar Questions
A metal wire of diameter 1.5 mm is held on two knife edges separated by a distance 50 cm the tension in the wire is 100 N the wire vibrating with its fundamental frequency and vibrating tuning fork together produces 5 beats per second. The tension in the wire is then reduced to 81 N, when the two are excited, beats are heard at the same rate. Calculate frequency of the fork.
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