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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 transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- The distance travelled by a particle starting from rest and moving
- When you make ice cubes, the entropy of water
- The temperature coefficient of the resistance of a wire is 0.00125 per ⁰C.
- The necessary condition in making of a junction transistor
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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