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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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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A susceptibility of a certain magnetic material is 400. What is the class
- A source of unknown frequency gives 4 beats/s, when sounded with a source harmonic
- The velocity of a particle at an instant is 10 ms⁻¹.After 3 s its velocity will become
- Given a sample of radium-226 having half-life of 4 days. Find the probability,
- Two bodies of mass 1 kg and 3 kg have positive vectors i + 2j + k and -3i -2j + k
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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