Physics question and answers for March 13, 2024
- Q An observer is moving with a speed 30 m s towards a stationary source of sound of frequency 100 Hz The apparent frequency heard by the observer will be speed...
- Q A large cylindrical chamber has a massless piston fitted at the top An acoustic source is situated at the centre the bottom of the cylinder while an observer is situated...
- Q A source of frequency 1800 Hz is moving on line with speed 30 m s An observer is standing at a point far distant from the line The wavelength of...
- Q 2 The volume of a room is 1200m3 The wall area of the room is 220m3 The floor area is 120 m2 and the ceiling area is 120m2 The average...
- Q Two boats are rowing on a pond in the same direction and with the same speed V Each boat sends through the water which is at rest a signal to...
- Q A tuning fork of natural frequency 250 Hz starts to vibrate At the same time another tuning fork is also vibrating If the intensity of sound is found to reach...
- Q A 3 6 m long vertical pipe is filled completely with a liquid A small hole is drilled at the base of the pip due to which liquids starts leaking...
- Q Sound waves in air are always longitudinal because Question Type Single Correct Type 1 2 3 density of air is very small Air is a mixture of several gases Air...
- Q A car blowing a horn of frequency 350 Hz is moving normally towards a wall with a speed of 5 m s The beat frequency heard by a person standing...
- Q A source of sound gives 5 beats per second when sounded with another source of frequency 100 second 1 The second harmonic of the source together with a source of...
- Q 29 A test tube of length 1 and area of cross section A has some iron fillings of mass M The test tube floats normally in a liquid of density...
- Q 4 A pipe open at one end has length 0 8 m At the open end of the tube a string 0 5m long is vibrating in its 1st overtone...
- Q The frequencies of two forks are 256 and 256 05 Hz When sounded together after how much interval maximum sound will become half if the minimum intensity is zero A...
- Q 23 The engine of a train sounds a whistle at frequency v The frequency heard by a passanger is If wind is blowing from passanger side to Train side A...
- Q 383 49 Two identical flutes produce fundamental notes of frequency 300 Hz at 27 C If the temperature of the air in one of the flutes is increased to 31...
- Q When open pipe is closed from one end then thir overtone of closed pipe is higher in frequency by 150 Hz than second overtone of open pipe The fundamental frequency...
- Q 1 c d 5 28 A long glass tube is held vertically in water A tuning fork is struck and held over the tube Strong resonances are observed at two...
- Q A closed organ pipe and an open organ pipe of sam length produce 2 beats sec when they are set int vibrations together in fundamental mode The lengt of open...
- Q A source of sound of single frequency vo flies along a straight line which is at a finite distance from the observer Then t observer hears 0 a frequency vo...
- Q orbed by rotating co Two to the wheel 1 50 A car is initially at rest 330 m away from a stationan observer It begins to move towards the observer...
- Q V1 and 2 are the velocities of sound at the same temperature in two monoatomic gases of densities p and P2 respectively If P P2 then the ratio of velocities...
- Q An air column tube is filled with water A sound source is placed just above it which emits a constant frequency As you lower the level of the water you...
- Q 1m 1 m a c 7 A sound is moving towards a stationary listener with th of the speed of sound The ratio of apparent to 10 real frequency is...
- Q a 2 89 There are 26 tuning forks arranged in the decreasing order of their frequencies Each tuning fork gives 3 beats with the next The first one is octave...
- Q c 67 The frequency of tuning fork is 256 Hz It will not resonate with a fork of frequency a 786 Hz c 512 Hz b 738 Hz d 256...
- Q of 300 m s 93 A train standing at the outer signal of a railway station blows a whistle of frequency 400 Hz in still air The train begins to...
- Q 354 96 A train approaching a railway platform with a speed of 20 m s starts blowing the whistle Speed of sound in air is 340 m s If the...
- Q Two tuning forks A and B produce notes of frequencies 258 Hz and 262 Hz An unknown note wounded with A produces certain beats When the same note is sounded...
- Q a zero b 5 c 1 98 A source of sound producing wavelength 50 cm is moving away from a stationary observer with speed of sound Then what is the...
- Q a c 430 Hz 87 A sound wave travels with a velocity of 300 m s through a gas 9 beats are produced in 3 s when two waves pass...
- Q c Third d Fourth tring 67 The frequency of tuning fork is 256 Hz It will not morts resonate with a fork of frequency and a 786 Hz c 512...
- Q 78 A glass tube of 1 0 m length is filled with wa The water can be drained out slowly at the bottom of the tube If a vibrating tuning...
- Q 69 A pipe 17 cm long is closed at one end Which harmonic mode of the pipe resonates a 1 5kHz source Speed of sound in air 340 ms b...
- Q pets do a 250 Hz b A tuning fork A of frequency 512 Hz produces 5 beats per second when sounded with another tuning fork 8 of unknown frequency If...
- Q c 680 Hz d 720 Hz 97 An observer moves towards a stationary source of sound with a velocity one fifth of the velocity of sound The percentage change in...
- Q c 75 ms 1 d 100 m s 72 A guitar string is 90 cm long and has a fundamental frequency of 124 Hz To produce a fundamental of 186...
- Q a 336 m s c 300 m s b 343 m s d 350 m st 75 Two pipes are each 50 cm in length One of them is closed...
- Q 320 Hz the original length of the wire is a 100 cm b 50 cm c 400 cm d 200 cm 4 A tuning fork of frequency 440 Hz resonates...
- Q cies ental a b u c 20 d 4u 65 A steel rod of length 100 cm is clamped at the middle The frequency of the fundamental mode for the...
- Q frequency phase and amplitude 59 One of the modes of resonance in a tube containing water at one end has been shown The tube in the present case is in...
- Q 70 A resonating air column shows resonance with a tuning fork of frequency 256 Hz at column lengths 78 33 4 cm and 101 8 cm The speed of sound...
- Q On sounding tuning fork A with another tuning fork B of frequency 384 Hz 6 beats are produced per second After loading the prongs of A with some wax and...
- Q A musical note on a piano has a frequency of 45 Hz If the tension in the 2 m string is 308 N and one half wavelength occupies the string...
- Q 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 1 c...
- Q A body is walking away from a wall towards an observer at a speed of 2 m s and blows a whistle whose frequency is 660 Hz The number of...
- Q A sound source of constant frequency travels with a constant velocity past an observer When it crosses the observer the sound frequency sensed by the observer changes from 360 Hz...
- Q An air column open at one end resonates with a tuning fork when the smallest length of the column is 20 cm The next larger length of the column resonating...
- Q 4 y 10 14 A man standing between two cliffs claps his hands 19 Aarobserw D sound wit and starts hearing a series of echoes at intervals of 2 sec...
- Q A man fires a bullet standing between two cliffs First echo is heard after 3 seconds and second echo is heard after 5 seconds If the velocity of sound is...
- Q Ice and water are placed in a closed container at a pressure of 1 atm and 273 15 K temperature If press of the system is increased by 2 atm...
- Q 1 what is the velocity of sound in glass tube if the glass tube is 4m 2 how do you compare velocity of sound and velocity of carbon dioxide using...
- Q 10 Three sound sources are emitting waves of wavelength 6 cm such that source at A is lagging in phase by 3 from source at B Source at C is...
- Q 5 An open organ pipe of length 1 is sounded together with another open organ pipe of length 1 x in their fundamental tones Speed of sound in air is...
- Q 6 Two sound sources are moving in opposite directions with velocities v and v v U Both are moving V1 away from a stationary observer The frequency of both the...
- Q 34 A source of frequency 10 kHz when vibrated over the mouth of a closed organ pipe is in unison at 300 K The beats produced when temperature rises by...
- Q Two tuning forks of frequency 250 Hz and 256 Hz produce beats If a maximum is observed just now after how much time the minimum is observed at the same...
- Q Erica listens to her headphones on full volume and it hurts her ears This is because the sound waves had too large of a n a Amplitude b Frequency Oc...
- Q 57 Plane simple harmonic waves of wavelength 120 cm and speed 34000 cm sec are incident normally on a plane surface which is a perfect reflector of sound Stationary waves...
- Q 41 Velocity of sound in an open organ pipe is 330 m s The frequency of wave is 1 1 kHz and the length of tube is 30 cm To...
- Q 3 A sound wave of wavelength 40 cm travels in air If the difference between the maximum and minimum pressures at a given point is 10 x 10 Nm find...
- Q 40 A closed organ pipe and an open organ pipe of same length produce 2 beats when they are set into vibrations simultaneously in their fundamental mode The length of...
- Q 47 A steel rod 100 cm long is clamped at its centre The fundamental frequency of longitudinal vibrations of the rod are given to be 2 53 kHz What is...
- Q 42 First overtone frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe Further nth harmonic of closed organ pipe is also...
- Q The sound waves after being converted into electrical waves are not transmitted as such because 1 They travel with the speed of sound 2 The frequency is not constant 3...
- Q 15 A string fixed at both ends vibrates in a resonant mode with a separation of 2 0 cm between the consecutive nodes For the next higher resonant frequency this...
- Q 39 A wave represented by the equation with another Y1 A cos kx wt is superimposed wave to form a stationary wave such that the point x 0 is a...
- Q 26 For a certain organ pipe three successive resonance frequencies are observed at 425 Hz 595 Hz and 765 Hz respectively If the speed of sound in air is 340...
- Q 46 Equations of a stationary and a travelling waves are y a sin kx cos wt and y2 a sin wt kx The phase difference between two points x1 x2...
- Q le ratio of intensities between two coherent sound sources is 4 1 The difference of loudness in decibel dB between maximum and minimum intensities when they interfere in space is...
- Q 2 A closed organ pipe and an open organ pipe of same length produce four beats in their fundamental mode when sounded together If length of the open organ pipe...
- Q Speed of sound waves in a fluid depends upon Question Type Single Correct Type 1 Directly on density of the medium 2 Square of Bulk modulus of the medium 3...
- Q A man standing between two cliffs hears the first echo of a sound after 1 5 sec and the second echo 2 5 sec after the initial sound If the...
- Q 13 A person can hear frequencies only upto 10 kHz A steel piano wire 50 cm long of mass 5 g is stretched with a tension of 400 N The...
- Q 6 The second overtone of an open pipe A and a closed pipe B have the same frequencies at a given temperature Both pipes contain air The ratio of fundamental...
- Q 11 Two trains move towards each other with the same speed Speed of sound is 340 ms 1 If the frequency of the tone of the whistle of one when...
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