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Two sources of sound S₁ and S₂ produce sound waves of the same frequency 660 Hz. A listener is moving from source S₁ towards S₂ with constant speed u m/s and he hears 10 beats. The velocity of sound is 330 m/s. Then u is equals

(a)5.5 m/s(b) 15.0 m/s(c)2.5 m/s(d) 10.0 m/sSolutionf1 = f[(v - v0)/v]f2 = f[(v + v0)/v]Frequency f2 - f1= f x (2v0/v)10 = 660 x (2u/330)u = 2.5... View Article

A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source when it is moving away from the observer after crossing him? (Take the velocity of sound in air as 350 m/s)

(a) 750 Hz(b) 857 Hz(c) 1143 Hz(d) 807 HzSolutionWhen source is moving towards a stationary observer,fapp = fsource {(V - 0)/(V - 50)}1000 =... View Article

A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of 10 km/h. If the wave speed is 330 m/s, the frequency heard by the running person shall be close to

(a) 666 Hz(b) 753 Hz(c) 500 Hz(d) 333 HzSolutionFrequency of the sound produced by the open flutef=2(v/2l) = (2 x 330)/(2 x 0.5) = 660 HzVelocity... View Article

Two sources of sound S₁ and S₂ vibrate at same frequency and are in phase

Question: Two sources of sound S1 and S2 vibrate at same frequency and are in phase (figure below). The intensity of sound detected at a point P... View Article

Two coherent sources S₁ and S₂ which emit sound of wavelength λ in phase.

Question: Figure (below) shows two coherent sources S1 and S2 which emit sound of wavelength λ in phase. The separation between the sources is... View Article

Two coherent narrow slits emitting sound of wavelength λ in the same phase are placed parallel to each other at a small separation

Question: Two coherent narrow slits emitting sound of wavelength λ in the same phase are placed parallel to each other at a small separation of... View Article

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Archives

Two sources of sound S₁ and S₂ produce sound waves of the same frequency 660 Hz. A listener is moving from source S₁ towards S₂ with constant speed u m/s and he hears 10 beats. The velocity of sound is 330 m/s. Then u is equals

A source of sound S is moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source when it is moving away from the observer after crossing him? (Take the velocity of sound in air as 350 m/s)

A musician using an open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of 10 km/h. If the wave speed is 330 m/s, the frequency heard by the running person shall be close to

Two sources of sound S₁ and S₂ vibrate at same frequency and are in phase

Two coherent sources S₁ and S₂ which emit sound of wavelength λ in phase.

Two coherent narrow slits emitting sound of wavelength λ in the same phase are placed parallel to each other at a small separation

Three sources of sound S₁, S₂ and S₃ of equal intensity are placed in a straight line

Two speakers S₁ and S₂, driven by the same amplifier, are placed at y = 1.0 m and y = – 1.0 m

Two sources of sound, S₁ and S₂, emitting waves of equal wavelength 20.0 cm, are placed with a separation

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