Questions
A tuning fork sounded together with a tuning fork of frequency 256 emits two beats. On loading the tuning fork of frequency 256, the number of beats heard are 1 per second. The frequency of tuning fork is
detailed solution
Correct option is D
nA = Known frequency = 256, nB = ?x = 2 bps, which is decreasing after loading (i.e. x↓) known tuning fork is loaded so nA↓ Hence nA↓ – nB = x↓ ... (i) → Correct nB – nA↓ = x↓ ... (ii) → Wrong⇒ nB = nA – x = 256 – 2 = 254 Hz.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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