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A vibrating string of certain length l under a tension T resonates with a mode corresponding to the first overtone (third harmonic) of an air column of length 75 cm inside a tube closed at one end. The string also generates 4 beats per second when excited along with a tuning fork of frequency n. Now when the tension of the string is slightly increased the number of beats reduces to 2 per second. Assuming the velocity of sound in air to be 340 m/s, the frequency n of the tuning fork in Hz is
Options
(a) 344
(b) 336
(c) 117.3
(d) 109.3
Correct Answer:
344
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- On the horizontal surface of a truck a block of mass 1 kg is placed (µ=0.6) and truck
- A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV.
- The potential energy of a long spring when stretched by 2 cm is U.
- The momentum of a photon of energy 1 MeV in kg m/s will be
- A spherical drop of mercury having a potential of 2.5 v is obtained as a result
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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