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Sound - I

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Which of the following options is right path followed by sound in ears?

  1. Outer ear - Canal - Inner ear - Ear drum - Brain

  2. Outer ear - Canal - Ear drum - Brain - Inner ear

  3. Outer ear - Ear drum - Canal - Inner ear - Brain

  4. Outer ear - Canal - Ear drum - Inner ear - Brain


Correct Option: D

In which medium sound cannot travel from one place to another?

  1. Solid

  2. Liquid

  3. Gas

  4. Vacuum


Correct Option: D
Explanation:

Sound cannot travel through vacuum.

What is the audible range of frequency of a healthy human being?

  1. 20 Hz to 200Hz

  2. 20 Hz to 2000 Hz

  3. 20 Hz to 20000 Hz

  4. 30 Hz to 30000 Hz


Correct Option: C

Which of the following does not produce sound?

  1. Guitar

  2. Tongue

  3. Vocal cord

  4. Harmonium


Correct Option: B
Explanation:

A rocket flying through space wil be silent because sound needs a medium to travel and cannot travel through the vacuum of space.

Which of the following motions of object is called oscillatory motion?

  1. Back and Forth

  2. Circular motion

  3. Uniform motion

  4. Non-uniform motion


Correct Option: A

Which of the following musical instruments is made with the help of coconut shell?

  1. Ektara

  2. Veena

  3. Tabla

  4. Manjira


Correct Option: A

Where is the vocal box present?

  1. It is present at the upper end of wind pipe.

  2. It is present at the lower end of wind pipe.

  3. It is present on the left side of wind pipe.

  4. It is present on the right side of wind pipe.


Correct Option: A

Why do men and women have a different voice?

  1. Length of vocal cord in men is 5 mm which is shorter than that of women.

  2. Length of vocal cord in men is 10 mm which is shorter than that of women.

  3. Length of vocal cord is women is 5 mm which is shorter than that of men.

  4. Length of vocal cord in women is 10 mm which is shorter than that of men.


Correct Option: C

Which of the following organs of the body produces sound in humans?

  1. Wind pipe

  2. Tongue

  3. Larynx

  4. Pharynx


Correct Option: C

In which of the media does sound travel?

  1. gases only

  2. solids only

  3. liquid only

  4. solid, liquid and gas


Correct Option: D

What happens to the sound when air is suck from the tumbler?

  1. Loudness increases

  2. Loudness decreases

  3. No effect

  4. Nature of the sound changes (from high pitch to low pitch)


Correct Option: B

Which parts of the human body vibrate during production of sound?

  1. Vocal cords

  2. Pharynx

  3. Windpipe

  4. Lungs


Correct Option: A

When do vocal cords produce sound of low frequency (bass sound)? When cords are

  1. thin and relaxed

  2. thick and relaxed

  3. thick and taut

  4. thin and taut


Correct Option: B

Which of the following is the shape of the outer part of the ear?

  1. circle

  2. oval

  3. funnel

  4. round


Correct Option: C

Why can we not hear sound on moon?

  1. Solid medium

  2. Liquid medium

  3. Gas medium

  4. Absence of medium


Correct Option: D

Which of the following voices is likely to have a minimum frequency?

  1. Man

  2. Woman

  3. Baby girl

  4. Baby boy


Correct Option: A

Which of the following is the reason that we are not able to see vibrations produced by an object, most of the time?

  1. Amplitude of vibrations is very small.

  2. Amplitude of vibrations is very large.

  3. Frequency of vibrations is very large.

  4. Frequency of vibrations is very small.


Correct Option: A

What do we call the thin stretched membrane present at the end of canal through which the air travels?

  1. Larynx

  2. Pharynx

  3. Vocal cords

  4. Ear drum


Correct Option: D

Where does ear drum send vibration?

  1. External ear

  2. Inner ear

  3. Brain

  4. Pharynx


Correct Option: B
Explanation:

Ear drum sends vibration to the inner ear.

Vibrations of which of the following vibrates ear drum?

  1. Sound

  2. Air

  3. Dust particle in the air

  4. External ear


Correct Option: A

When do vocal cords produce high frequency sound?

  1. It is produced when vocal cords are thin and relaxed.

  2. It is produced when vocal cords are thick and relaxed.

  3. It is produced when vocal cords are thick and taut.

  4. It is produced when vocal cords are thin and taut.


Correct Option: A
Explanation:

 When do vocal cords produce high frequency sound when vocal cords are thin and relaxed.

Arrange the water, metallic pipe and air according to their decreasing speed of sound.

  1. metallic pipe, air, water

  2. metallic pipe, water, air

  3. air, water, metallic pipe

  4. water, air, metallic pipe


Correct Option: B
Explanation:

Speed of sound in normal air is 343 m/s. In water, the speed is 1433 m/s. Speed of sound in metals is even more; like in copper, it is 4600 m/s and in iron, it’s 5130 m/s.

Which of the following motions is called vibratory motion?

  1. Uniform

  2. Circular

  3. To and fro

  4. Linear motion


Correct Option: C

We should not ever put sharp, pointed hard thing in the ear, because it can damage

  1. internal ear

  2. outer ear

  3. ear drum

  4. vocal cords


Correct Option: C

What is the difference between a school bell when not in use and when it is producing sound?

  1. Vibrations are produced by the bell when not in use and no vibrations are produced when it is in use.

  2. Vibrations are produced in both cases.

  3. No vibrations are produced whatsoever.

  4. Vibrations are produced when the bell is in use and no vibrations are produced when it is not in use.


Correct Option: D
Explanation:

 Vibrations are produced when the bell is in use and no vibrations are produced when it is not in use.

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