Sound Test

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Sound Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

The wave motion in which particles of the medium vibrate about their mean position, in a direction at right angle to the direction in which the wave travels is called

A
longitudinal

B
periodic

C
oscillatory

D
transverse
Question 2
1 / -0

Separation between two successive compressions (or rarefactions) in a longitudinal wave is

A
l

B

C

D
none of these
Question 3
1 / -0

A radio wave has a frequency of 10⁵ kHz Its time period is

A
10^-5s

B
10⁸s

C
10⁵s

D
10^-8s
Question 4
1 / -0

If two men talk on the moon`s surface, then

A
they hear each other with lower frequency

B
they hear each other with higher frequency

C
they can only hear each other

D
they can`t hear each other at all
Question 5
1 / -0

Study the following graphs and choose the correct option.

A
Wave B has higher pitch than wave A.

B
Waves A and B have the same pitch.

C
Wave A has higher pitch than wave B.

D
None of these
Question 6
1 / -0

Which of the following cannot travel through vacuum?

A
Light waves

B
Heat waves

C
Sound waves

D
X-rays
Question 7
1 / -0

If a wave takes 0.50 seconds to complete one oscillation, how many such oscillations will pass through a fixed point on its path in one second?

A
.

B
20

C
2

D
5
Question 8
1 / -0

What is the amplitude of the wave as shown below?

A
0.2 cm

B
0.5 cm

C
2 cm

D
0.1 cm
Question 9
1 / -0

The velocity of sound in air at 0^oC is

A
332 m/s

B
1500 m/s

C
2500 m/s

D
5000 m/s
Question 10
1 / -0

Sound has the maximum velocity in

A
gas

B
liquid

C
solid

D
vacuum
Question 11
1 / -0

Sound waves travel through sea water at about 1500 m/s. What frequency would generate a wavelength of 1.25 m in sea water?

A
1200 Hz

B
1875 Hz

C
600 Hz

D
1500 Hz
Question 12
1 / -0

Two sound waves, travelling in the same medium, have time periods in the ratio 2 : 3. What is the ratio of their speeds?

A
2 : 3

B
3 : 2

C
1 : 1

D
2 : 5
Question 13
1 / -0

Two sounds A and B are of frequencies f and 2f, respectively. Which of the following is correct?

A
B is grave, A is shrill

B
B is shrill, A is grave

C
Both sounds are identical

D
B is louder than A
Question 14
1 / -0

A person clapped his hands near a cliff and heard the echo after 3 s. What is the distance of the cliff from the person if the speed of the sound (v) is 346 ms^-1?

A
230.7 m

B
1038 m

C
461.4 m

D
519 m
Question 15
1 / -0

How can we reduce reverberation in an auditorium?

A
By making the walls thicker

B
By avoiding any draperies

C
By covering the walls with sound absorbing material

D
By making the walls with metal sheets instead of cement and concrete
Question 16
1 / -0

An echo is returned in 0.4 s. What is the distance of the reflecting surface from the source of sound?
(Take speed of sound = 344 ms^-1)

A
137.6 m

B
86.0 m

C
43.0 m

D
68.8 m
Question 17
1 / -0

Which of the following statements is incorrect?

A
Laws of reflection are similar for light and sound waves.

B
Speed, frequency and wavelength of sound are changed due to reflection.

C
The size of the reflector must be large as compared to the wavelength of sound wave for hearing the echo distinctly.

D
Echo method is used in radar to detect the presence of an obstacle.
Question 18
1 / -0

Bats can fly in the dark without hitting anything because

A
they are highly experienced

B
they have bad night vision

C
they are guided by ultrasonic waves, which they produce

D
they have night vision eyes
Question 19
1 / -0

Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. What is this technique called?

A
Ultrasonography

B
Ultrasound

C
Echography

D
Echocardiography
Question 20
1 / -0

A wavelength of 0.60 cm is produced in air and it travels at a speed of 320 ms^-1.Which wave will it be?

A
Audible wave

B
Infrasonic wave

C
Ultrasonic wave

D
None of these

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Re-Attempt Weekly Quiz Competition

Sound Test - 5

Result

Sound Test - 5

Score

-

Rank

-

SHARING IS CARING

Question 1

longitudinal

periodic

oscillatory

transverse

Question 2

l

none of these

Question 3

10-5 s

108 s

105 s

10-8 s

Question 4

they hear each other with lower frequency

they hear each other with higher frequency

they can only hear each other

they can`t hear each other at all

Question 5

Wave B has higher pitch than wave A.

Waves A and B have the same pitch.

Wave A has higher pitch than wave B.

None of these

Question 6

Light waves

Heat waves

Sound waves

X-rays

Question 7

.

20

2

5

Question 8

0.2 cm

0.5 cm

2 cm

0.1 cm

Question 9

332 m/s

1500 m/s

2500 m/s

5000 m/s

Question 10

gas

liquid

solid

vacuum

Question 11

1200 Hz

1875 Hz

600 Hz

1500 Hz

Question 12

2 : 3

3 : 2

1 : 1

2 : 5

Question 13

B is grave, A is shrill

B is shrill, A is grave

Both sounds are identical

B is louder than A

Question 14

230.7 m

1038 m

461.4 m

519 m

Question 15

By making the walls thicker

By avoiding any draperies

By covering the walls with sound absorbing material

10^-5s

10⁸s

10⁵s

10^-8s