Of the following the one which emits sound of higher pitch is
In the musical octave ‘Sa’, ‘Re’, ‘Ga’
Tone A has frequency of 240 Hz. Of the following tones, the one which will sound least harmonious with A is
Learned Indian classical vocalists do not like the accompaniment of a harmonium because
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
Two waves having sinusoidal waveforms have different wavelengths and different amplitude. They will be having
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 the beats heard per second will be
Two identical stringed instruments have frequency 100 Hz. If tension in one of them is increased by 4% and they are sounded together then the number of beats in one second is
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
Two whistles A and B produces notes of frequencies 660 Hz and 596 Hz respectively. There is a listener at the mid-point of the line joining them. Now the whistle B and the listener start moving with speed 30 m/s away from the whistle A. If speed of sound be 330 m/s, how many beats will be heard by the listener
A light pointer fixed to one prong of a tuning fork touches a vertical plate. The fork is set vibrating and the plate is allowed to fall freely. If eight oscillations are counted when the plate falls through 10 cm, the frequency of the tuning fork is
Two identical wires have the same fundamental frequency of 400 Hz. when kept under the same tension. If the tension in one wire is increased by 2% the number of beats produced will be
16 tunning forks are arranged in the order of increasing frequencies. Any two successive forks give 8 beats per sec when sounded together. If the frequency of the last fork is twice the first, then the frequency of the first fork is
A wire of density 9×103 kg /m3 is stretched between two clamps 1 m apart and is subjected to an extension of 4.9 × 10-4 m. The lowest frequency of transverse vibration in the wire is (Y = 9 ×1010 N / m2)
A man is watching two trains, one leaving and the other coming in with equal speeds of 4 m/sec. If they sound their whistles, each of frequency 240 Hz, the number of beats heard by the man (velocity of sound in air = 320 m/sec) will be equal to
Two speakers connected to the same source of fixed frequency are placed 2.0 m apart in a box. A sensitive microphone placed at a distance of 4.0m from their midpoint along the perpendicular bisector shows maximum response. The box is slowly rotated until the speakers are in line with the microphone. The distance between the midpoint of the speakers and the microphone remains unchanged. Exactly five maximum responses are observed in the microphone in doing this. The wavelength of the sound wave is
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of 27°C two successive resonances are produced at 20 cm and 73 cm ofcolumn length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at 27°C is
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is
The two nearest harmonics of a tube closed at one end and open at another end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?
Two cars moving in opposite directions approach each other with speed of 22 ms‾¹ and 16.5 ms‾¹ The driver of the first car blows a horn having a frequency 400 Hz. The frequency heard by the driver of the second car is (velocity of sound is 340 ms‾¹ )
The second overtone of an open organ pipe has the same frequency as the first overtone of a closed pipe L metre long. The length ofthe open pipe will be
Three sound waves of equal amplitudes have frequencies (n-1), n, (n+1). They superimpose to give beats. The number of beats produced per second will be
A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 ms¯¹ . Then, the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air =330 ms¯¹ )
An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is
