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General
Easy
Question
For a sound wave travelling towards +x direction, sinusoidal longitudinal displacement null at a certain time is given as a function of x. If Bulk modulus of air is null, the variation of pressure excess will be
The correct answer is:
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The figure represents the displacement y versusdistance x along the direction of propagation of a longitude wave. The pressure is maximum at position marked
The figure represents the displacement y versusdistance x along the direction of propagation of a longitude wave. The pressure is maximum at position marked
Physics-General
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Figure shown is a graph, at a certain time t, of the displacement function null of three sound waves 1,2 and 3 as marked on the curves that travel along x-axis through air. If P1, P2 and P3 represent their pressure oscillation amplitudes respectively, then correct relation between them is:
Figure shown is a graph, at a certain time t, of the displacement function null of three sound waves 1,2 and 3 as marked on the curves that travel along x-axis through air. If P1, P2 and P3 represent their pressure oscillation amplitudes respectively, then correct relation between them is:
Physics-General
General
Complete the following sentence with an appropriate conjunction.
I stayed an extra night ______________ I could see more of Alaska.
Complete the following sentence with an appropriate conjunction.
I stayed an extra night ______________ I could see more of Alaska.
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A transverse wave propagation on a stretched string of linear density 
is represented by equation 
where ' x ' is in meters and ' t ' is in seconds. The tension in string (in newtons) is
A transverse wave propagation on a stretched string of linear density is represented by equation where ' x ' is in meters and ' t ' is in seconds. The tension in string (in newtons) is
Physics-General
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A sonometer wire vibrating in fundamental mode is in unison with a tuning fork. Keeping the same tension, the length of the wire between the bridges is doubled. the tuning fork can still be in resonance with the wire. Provided the wire now vibrates in
A sonometer wire vibrating in fundamental mode is in unison with a tuning fork. Keeping the same tension, the length of the wire between the bridges is doubled. the tuning fork can still be in resonance with the wire. Provided the wire now vibrates in
Physics-General
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The time lag between two particles vibrating in a progressive wave separated by a distance 20 m is 0.02 s. The wave velocity if the frequency of the wave is 500 Hz, is
The time lag between two particles vibrating in a progressive wave separated by a distance 20 m is 0.02 s. The wave velocity if the frequency of the wave is 500 Hz, is
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The volume of a room is 
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. The floor and ceiling have area of 
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The volume of a room is . The wall area of the room is . The floor and ceiling have area of each. The absorption coefficients of walls, floor and ceiling are 0.03,0.8 and 0.06 respectively. Calculate the reverberation time
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The wave length of the sound produced by a source is 0.8 m. If the source moves towards the stationary listner at 
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The wave length of the sound produced by a source is 0.8 m. If the source moves towards the stationary listner at , what is the apparent wave length of sound if the velocity of sound is
Physics-General
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A rifle is fired in a valley formed between two parallel mountains. The echo from one mountain is heard after 1.5 s and from the other is heard 
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A rifle is fired in a valley formed between two parallel mountains. The echo from one mountain is heard after 1.5 s and from the other is heard later. What is the width of the valley? (velocity of sound )
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Two stretched wires of same length, diameter and same material are in unison. The tension in one is increased by 2% and 2 beats per second are heard. What was the frequency of the note produced when they were in unision
Two stretched wires of same length, diameter and same material are in unison. The tension in one is increased by 2% and 2 beats per second are heard. What was the frequency of the note produced when they were in unision
Physics-General
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An open pipe 30 cm long and a closed pipe 23 cm long, both of the same diameter, are each sounding their first overtone are in unison. The end correction of these pipes is
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Physics-General
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The velocities of sound in an ideal gas at temperature 
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are found to be 
and 
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The velocities of sound in an ideal gas at temperature and are found to be and respectively. If the r.m.s velocities of the molecules of the same gas at the same temperatures and are and respectively then
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In order to double the frequency of the fundamental note emitted by a stretched string, the length is reduced 3/4th of the original length and the tension is changed. The factor by which the tension is to be changed is
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The length of a sonometer wire AB is 100 cm, where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of 1:2:6
The length of a sonometer wire AB is 100 cm, where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of 1:2:6
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The internal energy of a solid also increases when heat is transferred to it from its surroundings. A 5 kg solid bar is heated at atmospheric pressure. Its temperature increases from 20°C to 70°C. The linear expansion coefficient of solid bar is 
The density of solid bar is 
The specific heat capacity of solid bar is 
The atmospheric pressure is 
The work done by the solid bar due to thermal expansion, under atmospheric pressure is
The internal energy of a solid also increases when heat is transferred to it from its surroundings. A 5 kg solid bar is heated at atmospheric pressure. Its temperature increases from 20°C to 70°C. The linear expansion coefficient of solid bar is The density of solid bar is The specific heat capacity of solid bar is The atmospheric pressure is The work done by the solid bar due to thermal expansion, under atmospheric pressure is
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