Waves Test

Result

Waves Test - 94

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following has high pitch in their sound?

A
Lion

B
Mosquito

C
Man

D
Woman

Solution
Question 2
4 / -1

A spherical source of power 4 W and frequency 800 Hz is emitting sound waves. The intensity of waves at a distance 200 m is

A
8 x 10^–6W/m ²

B
2 x 10^–4 W/m ²

C
1 x 10^–4 W/m ²

D
4 W/m ²
Question 3
4 / -1

If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of

A
9

B
3

C
6

D
√3

Solution
Question 4
4 / -1

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

A
Increased by a factor of 2

B
Decreased by a factor of 2

C
Decreased by a factor of 4

D
Unchanged

Solution
Question 5
4 / -1

A
3000

B
1000

C
300

D
30

Solution
Question 6
4 / -1

Decibel is unit of

A
Intensity of light

B
X-rays radiation capacity

C
Sound loudness

D
Energy of radiation
Question 7
4 / -1

When we hear a sound, we can identify its source from

A
Amplitude of sound

B
Intensity of sound

C
Wavelength of sound

D
Overtones present in the sound
Question 8
4 / -1

A man x can hear only upto 10 kHz and another many upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then

A
Both will hear sounds of same pitch but different quality

B
Both will hear sounds of different pitch but same quality

C
Both will hear sounds of different pitch and different quality

D
Both will hear sounds of same pitch and same quality
Question 9
4 / -1

A is singing a note and at the same time B is singing a note with exactly one-eighth the frequency of the note of A. The energies of two sounds are equal, the amplitude of the note of B is

A
Same that of A

B
Twice as that of A

C
Four times as that of A

D
Eight times as that of A

Solution
Question 10
4 / -1

If T is the reverberation time of an auditorium of volume V then

A

B

C

D

Solution