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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 car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz.
- A uranium nucleus ₉₂ U ²³⁸ emits an α-particle and a β-particle in succession.
- The electric resistance of a certain wire of iron is R. If its length and radius
- A conducting square frame of side ‘a’ and a long straight wire carrying current I
- The tension in a piano wire is 10 N. What should be the tension in the wire to produce
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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