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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An A.C source is rated at 220 V, 50 Hz. The time taken for voltage to change
- A 200 W sodium street lamp emits yellow light of wavelength 0.6 µm
- A Zenor diode has a contact potential of 1 V in the absence of biasing. It undergoes
- A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity
- RMS velocity of gas is proportional to
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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