Sound Test

Result

Sound Test - 67

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Weekly Quiz Competition

Question 1
1 / -0

When a tuning fork vibrates, the waves produced in the fork are

A
Longitudinal

B
Transverse

C
Progressive

D
Stationary

Solution

When a tuning fork vibrates, it sets up tiny waves of pressure in the air, which we detect as sound. These waves are compression waves or longitudinal waves in nature because the air gets compressed by the vibrating object and that compression is in the same direction as the wave travels.
Question 2
1 / -0

Eardrum is a part of

A
Hearing organ

B
Sound producing organ

C
Muscular system

D
None of these

Solution

Eardrum is a part of Hearing organ
Question 3
1 / -0

The sound in the audible range is called

A
Ultra sonic

B
Sonic

C
Sub sonic

D
Light sound

Solution

The sound in the audible range is called Sonic.
Question 4
1 / -0

Relation between frequency and time period is

A
Time period = frequency

B
(Frequency) =$$2 \times$$ time period

C
Frequency $$ = \dfrac{1}{{\text{Time period}}} $$

D
Frequency $$ = \dfrac{{\text{Time period}}}{2} $$

Solution

The relation is $$f =\dfrac 1T$$ or $$frequency = \dfrac{1}{Time \ period}$$
Question 5
1 / -0

The sound of frequency less than $$20\ Hz$$ is known as:

A
Ultrasonic

B
Infrasonic

C
Audible

D
None of these

Solution

Sounds with frequencies below $$20\ Hz$$ are called infrasound. Infrasound is too low-pitched for humans to hear.
Question 6
1 / -0

A pendulum oscillates $$20$$ times in $$2$$ seconds then its time period is

A
$$0.01 $$ sec

B
$$ 0.001 $$ sec

C
$$ 0.02 $$ sec

D
$$ 0.1 $$ sec

Solution

Time period is $$T=\dfrac 2 {20} = 0.1 / sec$$
Question 7
1 / -0

The loudness and pitch of a sound depends on:

A
Intensity and velocity

B
Frequency and velocity

C
Intensity and frequency

D
Frequency and number of harmonics

Solution

The magnitude of the maximum disturbance in the medium on either side of the mean value is called the amplitude of the wave. The loudness or softness of a sound depends on its amplitude.

The number of complete oscillations per unit time is called frequency. The pitch of a sound depends on frequency.
Question 8
1 / -0

In a clock, the time period of hour hand is :

A
$$1$$ hour

B
$$24$$ hour

C
$$12$$ hours

D
None of these

Solution

The hour hand of a clock completes one revolution in $$12\ hr$$. If the hour hand starts from $$12$$ in the noon then it will come back to $$12$$ at night. So it takes $$12\ hours$$ to complete one revolution.
Hence, the time period of the hound hand is $$12\ hours$$.
Question 9
1 / -0

The speed of a wave is $$ 350\, m/s $$ and its wavelength $$ 50\,cm $$ , then the frequency of the wave will be :

A
$$ 13500 \,Hz $$

B
$$ 700 \,Hz $$

C
$$ 400 \,Hz $$

D
$$ 300 \,Hz $$

Solution

Speed $$v$$, wavelength $$\lambda$$ and frequency $$\nu$$ of a wave is related as
$$v=\nu\times{\lambda}$$ $$\lambda=50cm$$ = $$0.5m$$
$$v=350m/s$$
so $$\nu=$$ $$\frac{v}{\lambda}$$ = $$\frac {350}{0.5}$$ = $$700Hz$$
Question 10
1 / -0

In longitudinal waves, the vibration of the particles of the medium:

A
is/are always in the direction of the wave

B
is / are always perpendicular to the direction of the wave

C
molecules do not vibrate at all

D
al an angle $$60^{\circ} $$ from the direction of wave

Solution

User

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Re-Attempt Weekly Quiz Competition

Sound Test - 67

Result

Sound Test - 67

Score

-

Rank

-

SHARING IS CARING

Question 1

Longitudinal

Transverse

Progressive

Stationary

Solution

Question 2

Hearing organ

Sound producing organ

Muscular system

None of these

Solution

Question 3

Ultra sonic

Sonic

Sub sonic

Light sound

Solution

Question 4

Time period = frequency

(Frequency) =$$2 \times$$ time period

Frequency $$ = \dfrac{1}{{\text{Time period}}} $$

Frequency $$ = \dfrac{{\text{Time period}}}{2} $$

Solution

Question 5

Ultrasonic

Infrasonic

Audible

None of these

Solution

Question 6

$$0.01 $$ sec

$$ 0.001 $$ sec

$$ 0.02 $$ sec

$$ 0.1 $$ sec

Solution

Question 7

Intensity and velocity

Frequency and velocity

Intensity and frequency

Frequency and number of harmonics

Solution

Question 8

$$1$$ hour

$$24$$ hour

$$12$$ hours

None of these

Solution

Question 9

$$ 13500 \,Hz $$

$$ 700 \,Hz $$

$$ 400 \,Hz $$

$$ 300 \,Hz $$

Solution

Question 10

is/are always in the direction of the wave

is / are always perpendicular to the direction of the wave

molecules do not vibrate at all

al an angle $$60^{\circ} $$ from the direction of wave

Solution

User

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