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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
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Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A body projected vertically from the earth reaches a height equal to earth’s radius
- The minimum wavelength of X-rays emitted by X-ray tube is 0.4125Å
- A 220 volts input is supplied to a transformer. The output circuit draws
- A spring gun of spring constant 90 N/cm is compressed 12 cm by a ball of mass
- When the angle of incidence is 60° on the surface of a glass slab, it is found
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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