Sound Test

Result

Sound Test - 48

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Weekly Quiz Competition

Question 1
1 / -0

The characteristic of sound which distinguishes a feeble sound from a loud sound of the same frequency is -

A
loudness

B
pitch

C
music

D
noise

Solution

Loudness is the characteristic of sound which distinguishes feeble voice from loud voice.
Question 2
1 / -0

The instrument used in the laboratory to produce sound of a fixed frequency is -

A
simple pendulum

B
tuning fork

C
thermometer

D
metre scale

Solution

A tuning fork is the instrument used to produce sound of a certain fixed frequency. A tuning fork is an acoustic resonator in the form of a two-prolonged fork with the prongs formed from a U-shaped bar of elastic metal.
Question 3
1 / -0

Select the odd one out (loudness, pitch, frequency, echo)

A
Echo

B
Loudness

C
Frequency

D
Pitch

Solution

Echo is a phenomenon, whereas others are characteristics of sound.
Question 4
1 / -0

Find the odd one out.

A
Loudness

B
Pitch

C
Timbre

D
Tone

Solution

The pitch, loudness and quality are the properties of the sound. A sound of single frequency is called a tone.
Question 5
1 / -0

Submarine uses ............................ for navigation which works on principle of ..........................

A
Radar, Reflection of ultrasonic waves.

B
Sonar, Reflection of ultrasonic waves.

C
Radar, Detection of cosmic radio waves.

D
Periscope, bending of light.

Solution

Answer is B
To locate a target, a submarine uses active and passive SONAR.
Sonar is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water by sending ultrasonic waves and receiving reflected ultrasonic waves and calculating time elapsed.
Question 6
1 / -0

The two arms in the U shaped section of tuning fork are called :

A
stem

B
prongs

C
handle

D
defis

Solution

The two arms in a U shaped tuning fork are called prongs . It is used in laboratory to produce a fixed frequency .
Question 7
1 / -0

Why the ceiling of concert halls, cinema halls made curved?

A
to make the hall beautiful.

B
for proper light conditions.

C
so that the sound can reach all corners properly.

D
So that the picture or the stage can be visible to each and energy person.

Solution

In concert halls, cinema halls, conference halls, the ceiling are made curved, so that the sound after reflection from the curved surface reaches all corners of the hall evenly.
Question 8
1 / -0

What conclusion can be obtained from the observation that when the prongs of a sound making tuning fork touch the surface of water in a beaker, the water gets splashed?

A
the prongs of tuning fork are vibrating.

B
the prongs of tuning fork produces sound.

C
waves are produced on the surface of water.

D
all

Solution

When a tuning fork is touched to the surface of water, water splashes because tuning fork is vibrating and its energy is transferred to the water molecules on surface.
Question 9
1 / -0

Name the device which is used to produce sound in laboratory experiments :

A
Tuning fork

B
Simple pendulum

C
Oscillator

D
All

Solution

When a tuning fork strikes on a rubber pad , due to the vibrations of arms of fork , a sound is produced .

A simple pendulum is an example of simple harmonic motion .
An oscillator is used to generate required frequencies .

Hence, option A is correct.
Question 10
1 / -0

Fix up one end of a slinky to a hook and hold it horizontally. Vibrate the other end to and fro along the length of the spring. If you look at the spring carefully, you will see some parts of the spring are pushed closer, while some other parts are pulled apart.

A
The portions which are pushed closer are called compressions

B
The portions which are pulled apart are called rarefactions

C
Both a and b

D
None

Solution

Compressions are the regions of high density and rarefactions are regions of low density. These compressions and rarefactions result because the sound is able to reflect off fixed ends and interfere with incident wave vibrate longitudinally. The longitudinal movement of air produces pressure fluctuations.

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Re-Attempt Weekly Quiz Competition

Sound Test - 48

Result

Sound Test - 48

Score

-

Rank

-

SHARING IS CARING

Question 1

loudness

pitch

music

noise

Solution

Question 2

simple pendulum

tuning fork

thermometer

metre scale

Solution

Question 3

Echo

Loudness

Frequency

Pitch

Solution

Question 4

Loudness

Pitch

Timbre

Tone

Solution

Question 5

Radar, Reflection of ultrasonic waves.

Sonar, Reflection of ultrasonic waves.

Radar, Detection of cosmic radio waves.

Periscope, bending of light.

Solution

Question 6

stem

prongs

handle

defis

Solution

Question 7

to make the hall beautiful.

for proper light conditions.

so that the sound can reach all corners properly.

So that the picture or the stage can be visible to each and energy person.

Solution

Question 8

the prongs of tuning fork are vibrating.

the prongs of tuning fork produces sound.

waves are produced on the surface of water.

all

Solution

Question 9

Tuning fork

Simple pendulum

Oscillator

All

Solution

Question 10

The portions which are pushed closer are called compressions

The portions which are pulled apart are called rarefactions

Both a and b

None

Solution

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