The time of reverberation of a room A is one second. What will be the time (in seconds) of reverbation of a room, having all the dimensions double of those of room A?
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Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds. The velocity of sound is
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(a) 300 m/s (b) 310 m/s (c) 320 m/s (d) 330 m/s
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A boat of anchor is rocked by waves whose crests are 100 m apart and velocity is 25 m/s. The boat bounces up once in every
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(a) 2500 sec (b) 75 sec […]
When the length of the vibrating segment of a sonometer wire is increased by 1%, the percentage change in its frequency is
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(a) 100 / 101 (b) 99 / 100 (c) 1 […]
The velocity of sound is V, in air. If the density of air is increased to four times, then the new velocity of sound will be
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(a) V/2 (b) V/12 (c) 12V […]
A tuning fork gives 4 beats with 50 cm length of a sonometer. If the length of the wire is shortened by 1 cm, the number of beats is still the same. The frequency of […]
Two waves represented by following equations are travelling in same medium y1=5 sin 2π (75t – 0.25x) and y2=10 sin 2π (150t – 0.50x). The intensity ratio I1/I2 of the two waves is
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Two strings A and B, made of same material are stretched by same tension. The radius of string A is double the radius of B. A transverse wave travels on A with speed Va and […]
A source of sound of frequency 256 Hz is moving rapidly towards a wall with a velocity of 5 m/s. The speed of sound is 300 m/s. If the observer is between the wall and […]
Two identical flutes produce fundamental notes of frequency 300 Hz at 27° C. If the temperature of air in one flute is increased to 31° C, the number of beats heard per sec will be […]
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