Tag: physics

Questions Related to physics

Which of the following order is correct?

how humans hear sound human ear study of sound sound physics
  1. Sound $\rightarrow$ ear $\rightarrow$ inner ear $\rightarrow$ vibration of eardrum $\rightarrow$ brain $\rightarrow$ hearing
  2. Ear $\rightarrow$ Vibration of eardrum $\rightarrow$ Inner ear $\rightarrow$ hearing $\rightarrow$ brain $\rightarrow$ vibration
  3. Sound $\rightarrow$ ear $\rightarrow$ inner ear $\rightarrow$ vibration of eardrum $\rightarrow$ hearing $\rightarrow$ brain
  4. Sound $\rightarrow$ ear $\rightarrow$ vibration of eardrum $\rightarrow$ inner ear $\rightarrow$ brain $\rightarrow$ hearing
Show answer
Correct Option: D
Explanation:

When sound strikes the ear drum, it vibrates and this vibration is carried to the inner ear from where it is carried to the brain in the form of impulse. The brain then gives the signal and we hear the sound.

The compressions and rarefactions are transmitted across the middle ear through

how humans hear sound human ear study of sound sound physics

  1. auditory tube

  2. ear ossicles

  3. cochlea

  4. all of these

Show answer
Correct Option: B
Explanation:

The compressions and rarefactions are transmitted across the middle ear through the three ear ossicles. The vibrations produced in the ear drum are amplified.

The tympanum of the ear receive the sound in the form of

how humans hear sound human ear study of sound sound physics

  1. compressions

  2. rarefaction

  3. reflection 

  4. both A and B

Show answer
Correct Option: D
Explanation:

The tympanum of the ear receive the sound in the form of compressions and rarefaction. These compressions and rarefaction strike the ear drum, the ear from begins to vibrate.

What stimulates the auditory nerve?

how humans hear sound human ear study of sound sound physics

  1. The movement of the three ear ossicles

  2. The movement of stirrup

  3. The movement of fluid in the cochlea

  4. All of these

Show answer
Correct Option: C
Explanation:

Cochlea is a coiled and fluid filled tube having sense of hearing.the movement of the fluid in the cochlea due to the vibrations stimulates the auditory nerve.

The thin stretched membrane at the end of the ear canal is 

how humans hear sound human ear study of sound sound physics

  1. Pinna

  2. Cochlea

  3. Eardrum

  4. Stapes

Show answer
Correct Option: C
Explanation:

Eardrum is the thin stretched membrane at the end of inner ear , which vibrates when sound wave strikes it .

Which part of the ear vibrates when sound waves enter our ear?

how humans hear sound human ear study of sound sound physics

  1. Ear canal

  2. Eardrum

  3. Pinna

  4. Cochlea

Show answer
Correct Option: B
Explanation:

Ear canal is provides the path to sound to ear .

Pinna collects the sound .
Cochlea transforms the sound in neural message .
Eardrum vibrates when sound wave strikes them .

Sound enters inner ear through

how humans hear sound human ear study of sound sound physics

  1. ossicles

  2. ear drum

  3. cochlea

  4. none of these

Show answer
Correct Option: A
Explanation:

Sound waves or vibrations enter the inner ear through middle ear bones or ossicles.

We find it difficult to hear if we put cotton in our ears. This is because

how humans hear sound human ear study of sound sound physics

  1. cotton damps the sound wave before reaching the ear drum

  2. cotton creates a vacuum in the ear

  3. cotton conducts the vibration to the ear drum

  4. none of the above is true

Show answer
Correct Option: A
Explanation:

Cotton, put inside ear, damps  the vibration entering the ear. So, when the damped sound reaches the eardrum, its vibration becomes lower than original. So, we find it difficult to hear.

A very loud sound

how humans hear sound human ear study of sound sound physics

  1. damages the hair cells of the inner ear

  2. damages the outer ear

  3. damages the middle ear

  4. reflects back from the ear

Show answer
Correct Option: A
Explanation:

A very loud sound damages the hair cells of the inner ear. The hair cells die and stop sending sound signals to the brain. Once damaged, these hair cells do not grow back.

Highest loudness of sound causing no harm to the ear is

how humans hear sound human ear study of sound sound physics

  1. 67 dB

  2. 650 dB

  3. 65 dB

  4. 20000 dB

Show answer
Correct Option: C
Explanation:

65 dB loudness causes no harm to human ears. But the damage occurs if the loudness exceeds 65 dB.