-
question_answer1)
A mechanical wave travels in a medium. Which of the following quantities is transferred from one place to another with the wave?
A)
Mass done
clear
B)
Speed done
clear
C)
Density done
clear
D)
Energy done
clear
View Solution play_arrow
-
question_answer2)
On a slinky, which of the following is produced?
A)
A longitudinal wave but not a transverse wave done
clear
B)
A transverse wave but not a longitudinal wave done
clear
C)
A longitudinal wave as well as a transverse wave done
clear
D)
Neither a longitudinal nor5 a transverse wave done
clear
View Solution play_arrow
-
question_answer3)
In which of the following media can non- mechanical waves travel?
A)
in vacuum as well as in a medium done
clear
B)
In vacuum but not in a medium done
clear
C)
In a medium but not in vacuum done
clear
D)
Neither in a medium nor in vacuum done
clear
View Solution play_arrow
-
question_answer4)
What is the distance between a crest and a trough in a wave?
A)
\[\lambda \] done
clear
B)
\[\frac{\lambda }{2}\] done
clear
C)
\[\frac{\lambda }{4}\] done
clear
D)
\[B\lambda \] done
clear
View Solution play_arrow
-
question_answer5)
A wave source produces \[20\] crests and \[20\] troughs in\[0.2\,\,s\]. Find the frequency of the wave.
A)
\[200\,\,Hz\] done
clear
B)
\[500\,\,Hz\] done
clear
C)
\[100\,\,Hz\] done
clear
D)
\[300\,\,Hz\] done
clear
View Solution play_arrow
-
question_answer6)
The time period of a periodic wave is\[0.02\] seconds. At a particular position there is a crest at\[t=0\]. At what value of \['t'\] will the next trough appear at this position?
A)
\[0.05\,\,s\] done
clear
B)
\[0.01\,\,s\] done
clear
C)
\[0.15\,\,s\] done
clear
D)
\[0.25\,\,s\] done
clear
View Solution play_arrow
-
question_answer7)
A longitudinal wave travels from east to west in air in which direction do the particles of air move?
A)
East to west done
clear
B)
East to west and north to south done
clear
C)
North to south done
clear
D)
South to north done
clear
View Solution play_arrow
-
question_answer8)
A long spring is fixed at one end. A person holding the other end compresses the spring with a jerk. The compression travels along the length of the spring. Which kind of wave is travelled along the length of the spring?
A)
Electromagnetic waves done
clear
B)
Transverse waves done
clear
C)
Longitudinal waves done
clear
D)
Both [a] and [c] done
clear
View Solution play_arrow
-
question_answer9)
Which of the following statements is NOT correct?
A)
The characteristic of sound that distinguishes a shrill noise from a grave one is called pitch, done
clear
B)
Pitch is not frequency/ but it changes with frequency. done
clear
C)
The voice of a girl is shriller than that of a boy. done
clear
D)
The roaring of a lion is shriller than the buzz of an insect done
clear
View Solution play_arrow
-
question_answer10)
Find the time period of a wave whose frequency is\[400\,\,Hz\]?
A)
\[0.0012\,\,s\] done
clear
B)
\[0.0025\,\,s\] done
clear
C)
\[0.0015\,\,s\] done
clear
D)
\[0.0010\,\,s\] done
clear
View Solution play_arrow
-
question_answer11)
What is the minimum distance between two crests called?
A)
Wavelength done
clear
B)
Amplitude done
clear
C)
Displacement done
clear
D)
Wave pulse done
clear
View Solution play_arrow
-
question_answer12)
A stone is dropped from the top of a tower of height\[300\,\,m\]into a pond at the base of the tower. When will the sound of the splash be heard at the top? (Velocity of sound \[=340\,\,m\,\,{{s}^{-1}}\] and\[g=9.8\,\,m\,\,{{s}^{-2}}\])
A)
\[5.6\,\,s\] done
clear
B)
\[8.7\,\,s\] done
clear
C)
\[5.4\,\,s\] done
clear
D)
\[6.7\,\,s\] done
clear
View Solution play_arrow
-
question_answer13)
What does a sound wave consist of?
A)
A number of compression pulses one after the other done
clear
B)
A number of rarefaction pulses one after the other done
clear
C)
Compression and rarefaction pulse separated by a distance equal to the wavelength done
clear
D)
Compression and rarefaction pulses done
clear
View Solution play_arrow
-
question_answer14)
If the density of air at a point through which a sound wave is passing is maximum at an instant, what will be the pressure at that point?
A)
Minimum done
clear
B)
Equal to the density of air done
clear
C)
Equal to the atmospheric pressure done
clear
D)
Maximum done
clear
View Solution play_arrow
-
question_answer15)
An object is moving at a speed greater than that of sound. What is the speed with which the object is moving?
A)
Ultrasonic speed done
clear
B)
Sonic speed done
clear
C)
Infrasonic speed done
clear
D)
Supersonic speed done
clear
View Solution play_arrow
-
question_answer16)
Which of the following is an elastic wave?
A)
Sound waves done
clear
B)
Light waves done
clear
C)
X-rays done
clear
D)
Radio waves done
clear
View Solution play_arrow
-
question_answer17)
In which of the three media does sound travel the fastest?
A)
Air done
clear
B)
Water done
clear
C)
Steel done
clear
D)
same in all media done
clear
View Solution play_arrow
-
question_answer18)
A sound wave has a frequency of \[1000\,\,Hz\] and a wavelength of\[34\,\,cm\]. How long will it take to travel\[1\,\,km\]?
A)
\[3.20\,\,s\] done
clear
B)
\[2.94\,\,s\] done
clear
C)
\[5.94\,\,s\] done
clear
D)
\[3.10\,\,s\] done
clear
View Solution play_arrow
-
question_answer19)
An object is \[11\,\,km\] below the sea level. A research vessel sends down a sonar signal to confirm its depth. How long will it take for the echo to reach the vessel? [Take the speed of sound in sea water as\[1,520\,\,m{{s}^{-1}}\]).
A)
\[15.30\,\,s\] done
clear
B)
\[14.47\,\,s\] done
clear
C)
\[12.20\,\,s\] done
clear
D)
\[11.13\,\,s\] done
clear
View Solution play_arrow
-
question_answer20)
A construction worker working at a height of \[78.4\,\,m\] above the ground bends and his helmet slips falls down. He hears the sound of the helmet hitting the ground \[0.23\] seconds after it slipped. Find the speed of sound in air.
A)
\[512\,\,m\,\,{{s}^{-1}}\] done
clear
B)
\[215\,\,m\,\,{{s}^{-1}}\] done
clear
C)
\[341\,\,m\,\,{{s}^{-1}}\] done
clear
D)
\[651\,\,m\,\,{{s}^{-1}}\] done
clear
View Solution play_arrow
-
question_answer21)
Ultrasonic waves are used for detecting objects under water. What is the technique/device used for this?
A)
Ultrasonography done
clear
B)
Echocardiography done
clear
C)
Phacoemulsification done
clear
D)
Sonar done
clear
View Solution play_arrow
-
question_answer22)
Which of the following properties of sound is affected by a change in the air temperature?
A)
Frequency done
clear
B)
Amplitude done
clear
C)
Intensity done
clear
D)
Wavelength done
clear
View Solution play_arrow
-
question_answer23)
The frequency of a sound wave is \[200\,\,Hz\] and its wavelength is\[150\,\,cm\]. What is the distance travelled by the sound wave in I the time taken to produce \[150\] waves?
A)
\[110\,\,cm\] done
clear
B)
\[225\,\,cm\] done
clear
C)
\[112.5\,\,cm\] done
clear
D)
\[336.5\,\,cm\] done
clear
View Solution play_arrow
-
question_answer24)
A worker lives at a distance of \[1.32\,\,km\] from the factory. If the speed of sound in air is\[330\,\,m\,\,{{s}^{-1}}\], how long will the sound of factory siren take to reach the worker?
A)
\[1\,\,s\] done
clear
B)
\[2\,\,s\] done
clear
C)
\[3\,\,s\] done
clear
D)
\[4\,\,s\] done
clear
View Solution play_arrow
-
question_answer25)
A boy stands facing a high wall at a distance of \[85\,\,m\] from it and then blows a whistle. Calculate the time interval when he hears an echo. (Speed of sound\[=340\,\,m\,\,{{s}^{-1}}\]).
A)
\[1\,\,s\] done
clear
B)
\[2\,\,s\] done
clear
C)
\[0.5\,\,s\] done
clear
D)
\[3\,\,s\] done
clear
View Solution play_arrow
-
question_answer26)
What is the velocity of sound in vacuum?
A)
\[332\,\,m\,\,{{s}^{-1}}\] done
clear
B)
\[330\,\,m\,\,{{s}^{-1}}\] done
clear
C)
\[288\,\,m\,\,{{s}^{-1}}\] done
clear
D)
\[Zero\] done
clear
View Solution play_arrow
-
question_answer27)
Longitudinal waves cannot travel through
A)
vacuum done
clear
B)
solids done
clear
C)
liquids done
clear
D)
gases done
clear
View Solution play_arrow
-
question_answer28)
A bomb explodes on the moon. How long will it take for the sound to reach the earth?
A)
\[10\] seconds done
clear
B)
\[1000\] seconds done
clear
C)
\[1\] day done
clear
D)
It does not reach the earth done
clear
View Solution play_arrow
-
question_answer29)
What are the sound waves of frequency more than \[20\,\,kHz\] called?
A)
Supersonics done
clear
B)
Audible done
clear
C)
In frasonics done
clear
D)
Ultrasonics done
clear
View Solution play_arrow
-
question_answer30)
A pendulum vibrates with a time period of 1 second. What kind of sound is produced by it?
A)
Supersonic done
clear
B)
Audible done
clear
C)
Infrasonic done
clear
D)
Ultrasonic done
clear
View Solution play_arrow
-
question_answer31)
When sound waves travel from one medium to another, which of the following physical quantities does NOT alter?
A)
Amplitude done
clear
B)
Velocity done
clear
C)
Frequency done
clear
D)
Intensity done
clear
View Solution play_arrow
-
question_answer32)
Flash and thunder are produced simultaneously. But the thunder is heard a few seconds after the flash is seen. Why?
A)
The speed of sound is greater than the speed of light. done
clear
B)
The speed of sound is equal to the speed of light. done
clear
C)
The speed of light is greater than the speed of sound. done
clear
D)
The speed of light is less than the speed of sound. done
clear
View Solution play_arrow
-
question_answer33)
Match the entries in Column j with those in Column II correctly.
|
Column-I |
|
Column-II |
[a] |
Microphone |
1. |
Wind energy into mechanical energy |
[b] |
Speaker |
2. |
Mechanical energy into sound energy |
[c] |
Reeds of a harmonium |
3. |
Electrical energy into sound energy |
[d] |
Sails of a ship |
4. |
Sound energy into electrical energy |
A)
a - 4, b - 3, c - 1, d - 2 done
clear
B)
a - 1, b - 2, c - 3, d - 4 done
clear
C)
a - 4, b - 2, c - 3, d - 1 done
clear
D)
a - 4, b - 3, c - 2, d - 1 done
clear
View Solution play_arrow
-
question_answer34)
How are bats able to fly in the dark?
A)
They produce infrasonic waves, done
clear
B)
They can hear ultrasonic sounds. done
clear
C)
They produce infrared waves. done
clear
D)
They can hear infrared waves. done
clear
View Solution play_arrow
-
question_answer35)
Which kind of waves are used in sonography?
A)
Infrared waves done
clear
B)
Micro waves done
clear
C)
Sound waves done
clear
D)
Ultrasonic waves done
clear
View Solution play_arrow
-
question_answer36)
What types of waves are seismic waves?
A)
Non-mechanical waves done
clear
B)
Elastic waves done
clear
C)
Mechanical waves done
clear
D)
Electromagnetic waves done
clear
View Solution play_arrow
-
question_answer37)
Arrange the following media in ascending order of the speed of sound in them,
(i) Water |
(ii) Steel |
(iii) Nitrogen |
A)
(iii), (ii), (i) done
clear
B)
(i), (iii), (ii) done
clear
C)
(iii), (i), (ii) done
clear
D)
(ii), (i), (iii) done
clear
View Solution play_arrow
-
question_answer38)
Who among the following are associated with\[SONAR\]?
A)
Sonograph done
clear
B)
Engineers done
clear
C)
Astronauts done
clear
D)
Navigators done
clear
View Solution play_arrow
-
question_answer39)
Why do distant sounds such as those of traffic and loudspeakers become Souder during the night time than during the day time?
A)
Due to the reflection of sound waves done
clear
B)
Due to the refraction of sound waves done
clear
C)
Due to the absence of other sounds done
clear
D)
Due to a clear perception of hearing done
clear
View Solution play_arrow
-
question_answer40)
During reflection of sound waves, which of the following properties change?
A)
Frequency and wavelength done
clear
B)
Frequency and speed done
clear
C)
Speed and wavelength done
clear
D)
Frequency, wavelength and speed done
clear
View Solution play_arrow
-
question_answer41)
A wave source produces \[10\] oscillations in\[100\,\,m\,\,s\]. Find the time period of the wave.
A)
\[1\] second done
clear
B)
\[0.01\]second done
clear
C)
\[10\] second done
clear
D)
\[0.1\]second done
clear
View Solution play_arrow
-
question_answer42)
Which of the following statements about sound waves is correct?
A)
Sound waves are not affected by the medium through which it travels. done
clear
B)
Sound waves travel faster in air than in liquid. done
clear
C)
Sound waves travel faster in a solid than in liquids and gases. done
clear
D)
Sound waves cannot travel through a solid. done
clear
View Solution play_arrow
-
question_answer43)
Which of the following is NOT an application of ultrasound waves?
A)
B)
C)
D)
View Solution play_arrow
-
question_answer44)
Why are the regions of compressions and rarefactions of sound waves formed?
A)
A sound wave undergoes diffraction behind obstacles. done
clear
B)
The reflected sound wave at a fixed end interferes with the incident wave. done
clear
C)
The longitudinal movement of air molecules produces pressure fluctuations. done
clear
D)
The speed of the sound wave changes as it travels through a medium. done
clear
View Solution play_arrow
-
question_answer45)
An ultrasonic wave is sent from a ship towards the bottom of the sea.-, It is. Found that the time interval between the sending and receiving of wave is\[1.6\,\,s\]. What is the depth of the sea, if the velocity of sound in sea water is?
A)
\[1120\,\,m\] done
clear
B)
\[60\,\,m\] done
clear
C)
\[1400\,\,m\] done
clear
D)
\[112\,\,m\] done
clear
View Solution play_arrow
-
question_answer46)
A tuning fork of frequency \[420\,\,Hz\] completes \[70\] vibrations. Find the distance travelled by sound in air.\[(v=360\,\,m\,\,{{s}^{-1}})\]
A)
\[20\,\,m\] done
clear
B)
\[50\,\,m\] done
clear
C)
\[60\,\,m\] done
clear
D)
\[80\,\,m\] done
clear
View Solution play_arrow
-
question_answer47)
A wave of frequency \[500\,\,Hz\] has a velocity of\[360\,\,m\,\,{{s}^{-1}}\]. Calculate the distance between two points that are \[{{60}^{o}}\] out of phase.
A)
\[12\,\,cm\] done
clear
B)
\[18\,\,cm\] done
clear
C)
\[24\,\,cm\] done
clear
D)
\[32\,\,cm\] done
clear
View Solution play_arrow
-
question_answer48)
Which of the following is independent of the remaining three for a sound wave?
A)
Frequency done
clear
B)
Wavelength done
clear
C)
Velocity done
clear
D)
Amplitude done
clear
View Solution play_arrow
-
question_answer49)
If the wavelength of a sound of frequency \[350\,\,Hz\] is\[0.5\,\,m\]. Find the velocity of sound.
A)
\[700\,\,m\,\,{{s}^{-1}}\] done
clear
B)
\[175\,\,m\,\,{{s}^{-1}}\] done
clear
C)
\[17.5\,\,m\,\,{{s}^{-1}}\] done
clear
D)
\[70\,\,m\,\,{{s}^{-1}}\] done
clear
View Solution play_arrow
-
question_answer50)
The velocity of sound in air
A)
decreases with an increase in temperature. done
clear
B)
increases with a decrease in temperature. done
clear
C)
decreases with a decrease in temperature. done
clear
D)
does not depend on temperature. done
clear
View Solution play_arrow