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Two sources P and Q produce notes of frequency 660 Hz each. A listener moves from P to Q with a speed of 1 ms⁻¹. If the speed of sound is 330 m/s, then the number of beats heard by the listener per second will be
Options
(a) zero
(b) 4
(c) 8
(d) 2
Correct Answer:
4
Explanation:
∆f / f = v / C
(beats) /2 / f = v / C
Beats = 2 fv / C = 4
Related Questions: - A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- If the terminal speed of a sphere of gold (density=19.5 kg/m³) is 0.2 m/s
- A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹.
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Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A galvanometer coil has a resistance of 15 ohm and gives full scale deflection
- If the terminal speed of a sphere of gold (density=19.5 kg/m³) is 0.2 m/s
- A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms⁻¹.
- A particle of mass m is driven by a machine that delivers a constant power k watts
- Dimensions [ML⁻¹T⁻¹] are related with
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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