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A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was
Options
(a) 510 Hz
(b) 514 Hz
(c) 516 Hz
(d) 508 Hz
Correct Answer:
508 Hz
Explanation:
The frequency of the piano string = 512+-4 = 516 or 508. When the tension is increased, beat frequency decreases to 2, it means that frequency of othe string is 508 as frequency of string increases with tension.
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Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A scooter is going round a circular road of radius 100 m at a speed of 10m/s
- The length of an elastic string is a metre when the longitudinal tension is 4N and b
- The drift velocity of the electrons in a copper wire of length 2 m under
- A body is rolling down an inclined plane.If KE of rotation is 40% of KE in a translatory
- A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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