Sound Test

Result

Sound Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

Unpleasant sound : Noise : : Pleasant sound :______. Fill in the blank.

A
Audible sound

B
Infrasound

C
Music

D
Ultrasound

Solution

Sounds that are unpleasing and disturbing to the ears are called noise, whereas, the pleasing and comforting to the ears are called music, like those produced by musical instruments.
Question 2
1 / -0

Presence of excessive or unwanted sounds in the environment is called

A
music

B
sound

C
noise pollution

D
all of the above

Solution

Too many and too loud sounds in the environment cause noise pollution. Noise pollution can be harmful to the health of people.
Question 3
1 / -0

Which of the following sounds have the highest frequency?
a) A man shouting.
b) The sound of a whistle.
c) A lion's roar.
d) The sound of a drum.

A
a

B
b

C
c

D
d

Solution

Low-frequency sounds are low pitched like that of a man shouting (85-185 Hz), a lion's roar (40-200 Hz), the sound of a drum (50-250 Hz) whereas frequency of the sound of a whistle varies between 500-5000 Hz.
Hence Option B.
Question 4
1 / -0

High frequency sound has a .......... pitch.

A
higher

B
softer

C
lower

D
none of the above

Solution

Frequency determines the pitch of a sound. Thus if the frequency of vibration is high, the sound has a higher pitch.
Question 5
1 / -0

Sound travels the fastest in which medium ?

A
Gaseous

B
Liquid

C
Solid

D
Vacuum

Solution

Sound is produced due to the vibration of different objects. Sound travels as a longitudinal wave through a material medium. Sound travels as successive compressions and rarefactions in the medium. Sound requires a medium to travel. It travels the fastest in a solid medium because the particles in a solid medium are closely placed as compared to liquids and gases.
Question 6
1 / -0

Which are the most important properties of sound?

A
Amplitude

B
Frequency

C
Loudness

D
Both A and B

Solution

The two most important properties of sound are amplitude and frequency because amplitude determines the loudness of sound and frequency determines its pitch. The loudness and pitch affect the quality of sound.
Question 7
1 / -0

Why Trees are planted along the roads?

A
To make the roads beautiful

B
To reduce noise pollution

C
To provide shade

D
All of the above

Solution

Trees absorb the sound vibrations produced by various sources and hence leading in prevention of noise pollution. It also provides shade and also makes the road appear beautiful.
So, the correct answer is 'All of the above'
Question 8
1 / -0

Mark the correct statement.

A
Time taken between two consecutive compressions or rarefactions is called the time period of the wave.

B
The sounds of a violin and a flute are different due to the difference in the medium through which they travel.

C
How the brain interprets the frequency of an emitted sound is called wavelength.

D
All the above are true

Solution

The time period is the time taken between two consecutive compressions or rarefractions.
Question 9
1 / -0

If an object oscillates $20$ times in $5\ sec$ , then what is the frequency of the object?

A
$4\ Hz$

B
$20\ Hz$

C
$5\ Hz$

D
$100\ Hz$

Solution

Given: No. of oscillations $= 20$
Time taken $= 5\ sec$
By using the formula:
$Frequency = \dfrac {\text {No of oscillations}}{\text {Time taken}}$ $= \dfrac {20}{5}$ $= 4\ Hz$
Question 10
1 / -0

Sound is a form of:

A
heat

B
vibration

C
energy

D
frequency

Solution

Sound is a form of energy that is produced due to the vibration of something.

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Re-Attempt Weekly Quiz Competition

Sound Test - 17

Result

Sound Test - 17

Score

-

Rank

-

SHARING IS CARING

Question 1

Audible sound

Infrasound

Music

Ultrasound

Solution

Question 2

music

sound

noise pollution

all of the above

Solution

Question 3

a

b

c

d

Solution

Question 4

higher

softer

lower

none of the above

Solution

Question 5

Gaseous

Liquid

Solid

Vacuum

Solution

Question 6

Amplitude

Frequency

Loudness

Both A and B

Solution

Question 7

To make the roads beautiful

To reduce noise pollution

To provide shade

All of the above

Solution

Question 8

Time taken between two consecutive compressions or rarefactions is called the time period of the wave.

The sounds of a violin and a flute are different due to the difference in the medium through which they travel.

How the brain interprets the frequency of an emitted sound is called wavelength.

All the above are true

Solution

Question 9

4 Hz4\ Hz4 Hz

20 Hz20\ Hz20 Hz

5 Hz5\ Hz5 Hz

100 Hz100\ Hz100 Hz

Solution

Question 10

heat

vibration

energy

frequency

Solution

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$4\ Hz$

$20\ Hz$

$5\ Hz$

$100\ Hz$