Quality of a musical note depends on :

(1) Harmonics present

(2) The amplitude of the wave

(3) Fundamental frequency

(4) The velocity of sound in the medium

Concept Questions :-

Standing waves
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If T is the reverberation time of an auditorium of volume V then :

(1) $T\propto \frac{1}{V}$

(2) $T\propto \frac{1}{{V}^{2}}$

(3) $T\propto {V}^{2}$

(4) $T\propto V$

Concept Questions :-

pressure wave in sound
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The intensity level due to two waves of the same frequency in a given medium are 1 bel and 5 bel. Then the ratio of amplitudes is :

(1) 1 : 4

(2) 1 : 2

(3) 1 : 104

(4) 1 : 102

Concept Questions :-

pressure wave in sound
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Of the following the one which emits the sound of a higher pitch is :

(1) Mosquito

(2) Lion

(3) Man

(4) Woman

Concept Questions :-

pressure wave in sound
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A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distances of 2m and 3m respectively from the source. The ratio of the intensities of the waves at P and Q is :

(1) 9 : 4

(2) 2 : 3

(3) 3 : 2

(4) 4 : 9

Concept Questions :-

Energy of waves
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Two waves having sinusoidal waveforms have different wavelengths and different amplitudes. They will be having :

(1) Same pitch and different intensity

(2) Same quality and different intensity

(3) Different quality and different intensity

(4) Same quality and different pitch

Concept Questions :-

pressure wave in sound
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The ends of a stretched wire of length L are fixed at x = 0 and x = L. In one experiment, the displacement of the wire is ${y}_{1}=A\mathrm{sin}\left(\pi x/L\right)\mathrm{sin}\omega t$ and energy is E1, and in another experiment its displacement is ${y}_{2}=A\mathrm{sin}\left(2\pi x/L\right)\mathrm{sin}2\omega t$ and energy is E2. Then :

(1) E2 = E1

(2) E2 = 2E1

(3) E2 = 4E1

(4) E2 = 16E1

Concept Questions :-

Energy of waves
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In the experiment for the determination of the speed of sound in air using the resonance column method, the length of the air column that resonates in the fundamental mode, with a tuning fork is 0.1 m. when this length is changed to 0.35 m, the same tuning fork resonates with the first overtone. Calculate the end correction :

(1) 0.012m

(2) 0.025m

(3) 0.05m

(4) 0.024m

Concept Questions :-

Standing waves
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Two identical stringed instruments have a frequency 100 Hz. If the tension in one of them is increased by 4% and they are sounded together then the number of beats in one second is :

(1) 1

(2) 8

(3) 4

(4) 2

Concept Questions :-

Beats
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The difference between the apparent frequency of a source of sound as perceived by an observer during its approach and recession is 2% of the natural frequency of the source. If the velocity of sound in air is 300 m/sec, the velocity of the source is : (It is given that velocity of source << velocity of sound)

(1) 6 m/sec

(2) 3 m/sec

(3) 1.5 m/sec

(4) 12 m/sec

Concept Questions :-

Doppler effect
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