Sound Test

Directions For Questions

Ultrasonic and Infrasonic Waves: The sound having frequency between $$20$$ Hz to $$20$$ kHz is called audible sound. Human ear cannot hear sound of frequencies lying outside this range. The limits of audibility of sound vary from individual. Generally the upper limit decreases with increase of age of individual; usually and people can not hear sound of frequency more than $$15$$ kHz.
Sound of frequencies below $$20$$ Hz are called infrasonics, while frequencies beyond $$20$$ kHz are called ultrasonics. Ultrasonics can be heard by dogs, cat, bats, etc. Bats detect the path by means of ultrasonics. Ultrasonics can be used for diagnosis of turnover and other abnormalities within our body. This is known as ultrasonography. Ultrasonics are used to cure various diseases and to measure depth of oceans to detect submarines.

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Sound Test - 44...

Question 1

Sound is absorbed by sand particles

Sound generated by the plate is more than the sand particles

Vibration of metal plate is more than sand particles

Sand does not vibrate

Question 2

Infrasonic

Ultrasonic

Energy

Vibrations

Question 3

The pitch of the sound.

The frequency of the sound.

The speed of the sound.

The wavelength of the sound.

Question 4

Lack of sleep

Hypertension

Anxiety

All of the above

Question 5

These are normal sounds waves whose frequency is less than $$20\ Hz$$. Humans cannot hear them because these waves have frequencies below the audible range.

These are normal sounds waves whose frequency is more than $$20,000\ Hz$$. Humans cannot hear them because these waves have frequencies above the audible range.

These are electromagnetic waves.

These are supersonic sound waves.

Question 6

Direction of vibration of particle is same as direction of energy

Direction of vibration of particle is perpendicular to the direction of energy

Vibration of particles does not exist

None of these

Question 7

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Statement 1 is true but statement 2 is false

Statement 1 is false but statement 2 is true

Question 8

$$15\times 10^{-3}m$$

$$11\times 10^{-3}m$$

$$17\times 10^{-3}m$$

$$15\times 10^{-8}m$$

Question 9

Infrasonics

Audible

Ultrasonic

None of these

Question 10

Brain

Outer ear

Nerve Cell

Middle ear

User

Question Analysis

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