-
question_answer1)
The frequency of a source is 20 kHz. The frequencies of the sound waves produced by it in water and air will
A)
Be the same as that of the source done
clear
B)
Depend upon the velocity of the waves in these media done
clear
C)
Depend upon the wavelength of the waves in these media done
clear
D)
Depend upon the density of the media. done
clear
View Solution play_arrow
-
question_answer2)
A.R. Rehman is conducting a musical night in an open auditorium in New York. If a person who is sitting in the auditorium at a distance of 250 m from the stage and the other who is watching the live program on a television set sitting in front of it in Hyderabad, then the person who hear him first is the
A)
Person sitting in auditorium done
clear
B)
Person sitting in Hyderabad done
clear
C)
Both will hear at the time done
clear
D)
Cannot be said. done
clear
View Solution play_arrow
-
question_answer3)
Read the given statements and select the correct option.
Statement 1: Echo is produced when sound is incident on hard and polished surface. |
Statement 2: Sound energy can be totally reflected by objects with soft and loose texture. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
clear
B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
clear
C)
Statement 1 is true but statement 2 is false. done
clear
D)
Both statements 1 and 2 are false. done
clear
View Solution play_arrow
-
question_answer4)
Match the column I with column II and mark the correct option from the codes given below.
Column I | Column II |
(a) String vibration | (i) Tabia |
(b) Membrane vibration | (ii) Bicycle bell |
(c) Vibration of air column | (iii) Sitar |
(d) Vibration of plate | (iv) Flute |
A)
(a) - (i), (b) - (iv), (c) - (ii), (d) - (iii) done
clear
B)
(a) - (iii), (b) - (i), (c) - (iv), (d) - (ii) done
clear
C)
(a) - (iv), (b) - (ii), (c) - (iii), (d) - (i) done
clear
D)
(a) - (ii), (b) - (iii), (c) - (i), (d) - (iv) done
clear
View Solution play_arrow
-
question_answer5)
The roofs and walls of the auditorium are generally covered with sound absorbent materials to reduce
A)
Velocity of sound done
clear
B)
Reverberation of sound done
clear
C)
Frequency of sound done
clear
D)
None of these done
clear
View Solution play_arrow
-
question_answer6)
A student plotted the following four graphs representing the variation of velocity v of sound in a gas with the pressure P for a given temperature. Which one is correct?
A)
B)
C)
D)
View Solution play_arrow
-
question_answer7)
A sound wave travelling in a medium is represented as shown in figure.
|
|
If vibrating source of sound makes 360 oscillations in 2 minutes, then the amplitude, wavelength and frequency of the sound wave respectively are (Take velocity of sound as\[342\text{ }m\text{ }{{s}^{-1}}\])
|
A)
1 m, 114 m and 3 Hz done
clear
B)
2 m, 3 m and 14 Hz done
clear
C)
1 m, 5 m and 20 Hz done
clear
D)
1 m, 100 m and 10 Hz. done
clear
View Solution play_arrow
-
question_answer8)
A submarine emits a SONAR pulse which returns from an underwater cliff in 1.05 second. If the speed of sound in salt water is \[1531\text{ }m\text{ }{{s}^{-1}}\], how far away is the cliff?
A)
\[1568\text{ }m\] done
clear
B)
\[803.7\text{ }m\] done
clear
C)
\[1607.4\text{ }m\] done
clear
D)
\[765.5\text{ }m\] done
clear
View Solution play_arrow
-
question_answer9)
Longitudinal wave can travel in
A)
solids only done
clear
B)
liquids only done
clear
C)
liquids and gases only done
clear
D)
all media done
clear
View Solution play_arrow
-
question_answer10)
Sound travels with a speed of about\[330\text{ }m\text{ }{{s}^{-1}}\]. What is the wavelength of sound whose frequency is 660 Hz?
A)
5 m done
clear
B)
50 m done
clear
C)
0.5 m done
clear
D)
500 m done
clear
View Solution play_arrow
-
question_answer11)
The diagram represents two different sound waves.
A)
The frequency of X is less than Y and pitch of X is less than Y. done
clear
B)
The frequency and pitch of X is same as the frequency and pitch of Y. done
clear
C)
The frequency of X is less than Y but its pitch is same as Y. done
clear
D)
The frequency of X is same as Y but its pitch is higher than Y. done
clear
View Solution play_arrow
-
question_answer12)
The diagram shows the positions of the air particles due to propagation of sound, represented by straight lines, at a particular instant from P to Q.
|
|
Which of the following statements correctly depicts the pressure variation with respect to distance?
|
A)
The lines which are closed to one another represent rarefaction which is a low pressure region. done
clear
B)
The lines which are far apart from one another represent compression which is a low pressure region. done
clear
C)
The lines which are far apart from one another represent rarefaction which is high pressure region. done
clear
D)
The lines which are closed to one another represent compression which is a high pressure region. done
clear
View Solution play_arrow
-
question_answer13)
There are two walls A and B which are 180 m apart from each other. A boy standing at 60 m away from wall A claps his hands once. If the speed of sound in air is \[330\text{ }m\text{ }{{s}^{-1}}\], what is the time interval between the first and the second echo that he hears?
A)
0.36 s done
clear
B)
0.24 s done
clear
C)
0.4 s done
clear
D)
1 s done
clear
View Solution play_arrow
-
question_answer14)
A microphone is connected to a cathode ray oscilloscope. A loudspeaker giving a single note is switch on. The trace shown in the figure appears on the screen.
|
|
Which of the following shows the softer but same frequency note of the given note?
|
A)
B)
C)
D)
View Solution play_arrow
-
question_answer15)
Four sound waves M, N, O and P are shown in figures below. Which of the following is correct statement?
A)
M and P have the same loudness. done
clear
B)
N and O have the same loudness. done
clear
C)
N and P have the same loudness. done
clear
D)
M and O have the same loudness. done
clear
View Solution play_arrow
-
question_answer16)
Which of the following statements is correct, when two sound waves with same frequency and constant phase difference interfere?
A)
There is a gain of energy. done
clear
B)
There is a loss of energy. done
clear
C)
The energy is redistributed as direction change. done
clear
D)
The energy is redistributed and the distribution remains constant in time. done
clear
View Solution play_arrow
-
question_answer17)
Direction: Read the passage carefully and answer the following question. |
Two tuning forks, A and B vibrate with frequencies in the ratio 2 : 7 and their wavelengths in the ratio 3 : 4 respectively. Both the tuning forks are placed in different media. |
Find the tuning fork producing greater velocity of sound.
A)
Tuning fork A done
clear
B)
Tuning fork B done
clear
C)
Both produce sound of same velocity done
clear
D)
Cannot say done
clear
View Solution play_arrow
-
question_answer18)
Direction: Read the passage carefully and answer the following question. |
Two tuning forks, A and B vibrate with frequencies in the ratio 2 : 7 and their wavelengths in the ratio 3 : 4 respectively. Both the tuning forks are placed in different media. |
The tuning fork A produces relatively
A)
Shrill sound than tuning fork B done
clear
B)
Flat sound than tuning fork B done
clear
C)
Louder sound than tuning fork B done
clear
D)
Sound of more wavelength than that of tuning fork B. done
clear
View Solution play_arrow
-
question_answer19)
A man standing in front of a large wall claps at a regular frequency of 10 Hz. He finds that the echoes coincide with his clapping. (The speed of sound in air is \[330\text{ }m\text{ }{{s}^{-1}}\].)
(i) Time taken between successive clapping is 0.1 s. |
(ii) The distance between the man and the wall, after he stops clapping, if he hears one more echo is 33 m. |
(iii) The distance between the man and the wall, after he stops clapping, if he hears four more echoes is 66 m. |
A)
Only (i) and (ii) are correct. done
clear
B)
Only (ii) and (iii) are correct. done
clear
C)
Only (i) and (iii) are correct. done
clear
D)
All (i), (ii) and (iii) are correct. done
clear
View Solution play_arrow
-
question_answer20)
A stone is dropped from the top of a tower of 125 m high into a pond which is at base of the tower. When will the splash be heard at the top? (Given \[g\text{ }=\text{ }10\text{ }m\text{ }{{s}^{-2}}\] and speed of sound\[=\text{ }340\text{ }m\text{ }{{s}^{-1}}\].)
A)
5 s done
clear
B)
0.36 s done
clear
C)
5.36 s done
clear
D)
2 s done
clear
View Solution play_arrow