Sound Test

Result

Sound Test - 22

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Weekly Quiz Competition

Question 1
1 / -0

Pitch of sound is determined by:

A
amplitude of the wave

B
vibration of the wave

C
frequency of sound wave

D
all

Solution

Frequency of a sound wave determines its pitch.
Pitch is a characteristic of a sound that depends on the frequency received by a human ear. It is simply a measure of shrillness of the sound. Higher the frequency, higher the pitch, more shrill will be the sound.
Question 2
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 3
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 4
1 / -0

The vibrations or the pressure variations inside the inner ear are converted into electrical signals by the _____

A
Cochlea

B
Hammer

C
Stirrup

D
Anvil

Solution

Cochlea converts vibrations into electric signals. Hammer, Anvil, Stirrup are the bones of the ear. They amplify the vibrations.
Question 5
1 / -0

Function of transmitter in a SONAR is to

A
Produce infrasonic waves

B
Convert the reflects ultrasonic waves into electrical signals

C
Produce and transmits ultrasonic waves

D
All the above

Solution

Transmitter produces and transmits ultrasonic waves of very high frequency and detector converts the reflected ultrasonic waves into electric signals.
Question 6
1 / -0

Larger the amplitude, ............... is the sound.

A
softer

B
shriller

C
flatter

D
louder

Solution

Amplitude is merely the magnitude of sound. Thus, more the amplitude, louder is the sound.
Question 7
1 / -0

If 1500 oscillations are produced in $$5$$ seconds, what is the frequency in hertz?

A
$$300\ Hz$$

B
$$150\ Hz$$

C
$$550\ Hz$$

D
None

Solution

Frequency: Oscillation completed in one second.
In 5 seconds 1500 oscillations are produced
So, in 1 second 1500/5 = 300 oscillations are produced.
Hence, the frequency = 300 Hz.
Question 8
1 / -0

High pitched sound : Whistling : : Low pitched sound : ................

A
Roar of a lion

B
Woman's scream

C
Chirping of birds

D
Crying of babies

Solution

The roar of a lion is a low - pitched sound this is because the lion has a larger voice box and a shorter amplitude and thus produces a hoarse and heavy voice.
Question 9
1 / -0

Mark the incorrect statements.
(a) intensity of sound depends on the response of our ears
(b) loudness can be measured as a physical quantity
(c) loudness is a subjective quantity.

A
a, b

B
a, c

C
b, c

D
all of them

Solution

The intensity of sound is an objective, measurable quantity. It does not depend on the response of our ears.
Loudness is a subjective quantity. It cannot be measured as a physical quantity.
Question 10
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.

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Re-Attempt Weekly Quiz Competition

Sound Test - 22

Result

Sound Test - 22

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SHARING IS CARING

Question 1

amplitude of the wave

vibration of the wave

frequency of sound wave

all

Solution

Question 2

Amplitude

Frequency

Loudness

Both A and B

Solution

Question 3

$$4\ Hz$$

$$20\ Hz$$

$$5\ Hz$$

$$100\ Hz$$

Solution

Question 4

Cochlea

Hammer

Stirrup

Anvil

Solution

Question 5

Produce infrasonic waves

Convert the reflects ultrasonic waves into electrical signals

Produce and transmits ultrasonic waves

All the above

Solution

Question 6

softer

shriller

flatter

louder

Solution

Question 7

$$300\ Hz$$

$$150\ Hz$$

$$550\ Hz$$

None

Solution

Question 8

Roar of a lion

Woman's scream

Chirping of birds

Crying of babies

Solution

Question 9

a, b

a, c

b, c

all of them

Solution

Question 10

Gaseous

Liquid

Solid

Vacuum

Solution

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