-
question_answer1)
The velocity of sound in air is 344 m/sec. What is the wavelength of a sound wave of frequency 32Hz?
A)
9.75 m done
clear
B)
10.75 m done
clear
C)
7.25 m done
clear
D)
8.25 m done
clear
View Solution play_arrow
-
question_answer2)
A wave travels at a speed of 330 m/s. If the wavelength is 2.2 cm, what will be the frequency of the wave?
A)
15,000 Hz done
clear
B)
14,500 Hz done
clear
C)
15,500 Hz done
clear
D)
14,000 Hz done
clear
View Solution play_arrow
-
question_answer3)
Calculate the wavelength of radio waves of frequency\[\text{1}{{0}^{9}}\text{Hz}\]. The speed of radio waves is \[\text{3}\times \text{1}{{\text{0}}^{8}}\text{m}/\text{s}.\]
A)
20 cm done
clear
B)
35 cm done
clear
C)
30 cm done
clear
D)
25 cm done
clear
View Solution play_arrow
-
question_answer4)
Calculate the wavelength of the wave generated by a tuning fork of frequency 256 Hz. velocity of sound in air at ordinary conditions is 340 m/s.
A)
1.33 m done
clear
B)
2.3 m done
clear
C)
0.1 m done
clear
D)
0.3 m done
clear
View Solution play_arrow
-
question_answer5)
A tuning fork produces 256 waves in 2 seconds. Calculate the frequency of the tuning fork.
A)
1.120 Hz done
clear
B)
125 Hz done
clear
C)
128 Hz done
clear
D)
130 Hz done
clear
View Solution play_arrow
-
question_answer6)
The frequency of a source of sound is 100 Hz. How many times it vibrates in a minute?
A)
5000 done
clear
B)
6000 done
clear
C)
5400 done
clear
D)
5500 done
clear
View Solution play_arrow
-
question_answer7)
The lowest part of the transverse wave below the line of zero disturbance is the
A)
compression done
clear
B)
crest done
clear
C)
trough done
clear
D)
rarefaction done
clear
View Solution play_arrow
-
question_answer8)
Density - distance graph represents
A)
light waves done
clear
B)
longitudinal waves done
clear
C)
transverse wave done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer9)
The speed of electromagnetic wave is
A)
\[\text{3}\times \text{1}{{\text{0}}^{8}}\text{cm}/\text{s}\] done
clear
B)
\[\text{3}\times \text{1}{{\text{0}}^{8}}\text{m}/\text{s}\] done
clear
C)
340 m/s done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer10)
In a wave motion, the particles oscillate perpendicular to the direction of wave propagation. The wave is
A)
transverse done
clear
B)
longitudinal done
clear
C)
both (a) and (b) done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer11)
Which of the following wave is a mechanical wave?
A)
light wave done
clear
B)
sound wave done
clear
C)
radio wave done
clear
D)
micro wave done
clear
View Solution play_arrow
-
question_answer12)
The separation between two successive crests in a wave is
A)
\[\lambda \] done
clear
B)
\[\lambda /2\] done
clear
C)
\[2\lambda \] done
clear
D)
\[\lambda /4\] done
clear
View Solution play_arrow
-
question_answer13)
The distance between a compression and the next rarefaction in a longitudinal wave is
A)
\[\lambda /2\] done
clear
B)
\[\lambda \] done
clear
C)
\[\lambda /4\] done
clear
D)
\[2\lambda \] done
clear
View Solution play_arrow
-
question_answer14)
The distance between a crest and the next trough in a transverse wave is
A)
\[\lambda /2\] done
clear
B)
\[\lambda /4\] done
clear
C)
\[\lambda \] done
clear
D)
\[2\lambda \] done
clear
View Solution play_arrow
-
question_answer15)
If the distance between a crest and the adjoining trough is 20 cm. Then the wave - length will be
A)
30 cm done
clear
B)
20 cm done
clear
C)
40 cm done
clear
D)
25 cm done
clear
View Solution play_arrow
-
question_answer16)
Distance between 5th and 15th crest is 20 cm. What is the wave-length of sound?
A)
2 cm done
clear
B)
4 cm done
clear
C)
3 cm done
clear
D)
5 cm done
clear
View Solution play_arrow
-
question_answer17)
A man standing near a cliff with a seconds pendulum fires a gun when the pendulum is at the mean position and hears the echo when it just reaches the extreme position. If the speed of sound is\[\text{34}0\,\text{m}{{\text{s}}^{-\text{1}}}\], calculate his distance from the cliff.
A)
80 m done
clear
B)
85 m done
clear
C)
75 m done
clear
D)
70 m done
clear
View Solution play_arrow
-
question_answer18)
A man stands at a distance of 255m from a cliff. He fires a gun and heard the echo after 1.5 seconds. What will be the velocity of the sound?
A)
330 m/s done
clear
B)
340 m/s done
clear
C)
320 m/s done
clear
D)
335 m/s done
clear
View Solution play_arrow
-
question_answer19)
A boy stands 85m in front of a high wall and then blows a whistle. Calculate the time interval when he hears an echo. (speed of sound = 340 m/s)
A)
0.5s done
clear
B)
5s done
clear
C)
1.5s done
clear
D)
2s done
clear
View Solution play_arrow
-
question_answer20)
An echo returned in 3s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m/s?
A)
520 m done
clear
B)
515 m done
clear
C)
530 m done
clear
D)
513 m done
clear
View Solution play_arrow
-
question_answer21)
A man stands in between two cliffs and fires a gun. He hears two successive echoes after 3 seconds and 5 seconds. What is the distance between two cliffs? [speed of sound\[=\text{33}0\text{m}{{\text{s}}^{-\text{1}}}\]]
A)
1320 m done
clear
B)
132 m done
clear
C)
1333 m done
clear
D)
1230 m done
clear
View Solution play_arrow
-
question_answer22)
Loudness depends on
A)
the amplitude of vibrations done
clear
B)
the area of vibrating body. done
clear
C)
the distance of the listener from the source of sound. done
clear
D)
all of these done
clear
View Solution play_arrow
-
question_answer23)
Statement A: A female voice is more shrill than the male voice. Statement B: A father's voice is more shrill than his son's voice.
A)
only statement A is true done
clear
B)
only statement B is true done
clear
C)
both the statements are true done
clear
D)
both the statements are false done
clear
View Solution play_arrow
-
question_answer24)
____ is the property of sound which distinguishes the degree of sensation produced in the ear.
A)
Loudness done
clear
B)
Pitch done
clear
C)
Quality done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer25)
The amount of sound energy passing each second through a unit area, is called _______ of sound.
A)
intensity done
clear
B)
Pitch done
clear
C)
Quality done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer26)
______ is the characteristic of a musical sound by which a loud sound can be distinguished from a faint sound even though both have the same pitch.
A)
Loudness done
clear
B)
Pitch done
clear
C)
Quality done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer27)
Loudness of sound is directly proportional to the ___ of the amplitude of the wave.
A)
cube done
clear
B)
square done
clear
C)
fourth power done
clear
D)
sixth power done
clear
View Solution play_arrow
-
question_answer28)
The greater the surface area of the vibrating body, the ___ is the loudness of sound.
A)
lesser done
clear
B)
greater done
clear
C)
remains same done
clear
D)
none of these done
clear
View Solution play_arrow
-
question_answer29)
The loudness of sound varies inversely as the__ of the distance of the vibrating body.
A)
cube done
clear
B)
square done
clear
C)
fourth power done
clear
D)
sixth power done
clear
View Solution play_arrow
-
question_answer30)
The loudness of sound is ___ proportional to the density of the medium through which it propagates.
A)
directly done
clear
B)
inversely done
clear
C)
sometimes (a), sometimes (b) done
clear
D)
none done
clear
View Solution play_arrow
-
question_answer31)
Loudness is ___ in dry air than in moist air which is lighter.
A)
less done
clear
B)
more done
clear
C)
sometimes (a) , sometimes (b) done
clear
D)
none done
clear
View Solution play_arrow
-
question_answer32)
The loudness of sound ____due to the presence of other resonant bodies near the source of sound.
A)
decreases done
clear
B)
increases done
clear
C)
sometimes (a), sometimes (b) done
clear
D)
none done
clear
View Solution play_arrow