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Easy
Question
The velocity of a transverse wave in a stretched wire is 100ms–1. If the length of wire is doubled and tension in the string is also doubled, the final velocity of the transverse wave in the wire is
The correct answer is:
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A sonometer has 25 forks. Each produces 4 beats with the next one. If the maximum frequency is 288 Hz, which is the frequency of last fork. The lowest frequency is
A sonometer has 25 forks. Each produces 4 beats with the next one. If the maximum frequency is 288 Hz, which is the frequency of last fork. The lowest frequency is
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A window whose area is 2 m2 open on a street where the street noise results at the window an intensity level of 80 dB. How much acoustic power enters the window through sound waves?
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Two aeroplanes ‘A’ and ‘B’ are moving away from one another with a speed of 720 kmph. The frequency of the whistle emitted by ‘A’ is 1100 Hz. The apparent frequency of the whistle as heard by the passenger of the aeroplane ‘B’ is.(velocity of sound in air is 350 ms-1)
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The equation of a wave is 
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The extension in a string, obeying Hooke’s law is x. The speed of sound in the stretched string is V. If the extension in the string is increased to 2x then speed of sound will be
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The linear density of a vibrating string is 
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If the speed of sound is changed by 1 percent, the temperature of air near 0°C be changed is
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A wave pulse on a string has the dimension shown in figure. The wave speed is null. If point O is a free end. The shape of wave at time null is
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The equation of progressive wave is 
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a) Velocity of wave is 50 m/s
b) Maximum velocity of particle is 1m/s
c) Wave length of wave is 2Π meter
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Sound signal is sent through a composite tube as shown in figure. The radius of the semicircle is r. Speed of sound in air is V. The source of sound is capable to generate frequencies in the range null. If n is an integer then frequency for maximum intensity is given by
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A transverse wave is passing through a light string shown in the figure. The equation of wave is y null The area of cross-section of string is A and density is r . The hanging mass is
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An open pipe resonates to a frequency f1 and a closed pipe resonates to a frequency f2. If they are joined together to form a longer tube, then it will resonate to a frequency of (neglect end corrections)
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