Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice how humans hear sound human ear study of sound sound physics

Why can't we hear the scream of bat?

  1. Because its scream consists of infrasonic sound

  2. Because its scream consists of ultrasonic sound

  3. Because its scream consists of subsonic sound

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bats produce ultrasonic sound and thus humans cannot hear them. Bats emit sound in the range of $20,000$ to $100,000\ Hz$ which is beyond our audible range.

Multiple choice how humans hear sound human ear study of sound sound physics

What is conductive hearing loss?

  1. When outer or middle ear leads to problem and inefficient transfer of sound

  2. When inner ear leads to problem and inefficient transfer of sound

  3. When only middle ear leads to problem and inefficient transfer of sound

  4. When inner and middle ear leads to problem and inefficient transfer of sound
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When outer or middle ear gets damage causing insufficient transfer of sound to inner ear.

Multiple choice how humans hear sound human ear study of sound sound physics

Which of the following is / are true?

  1. the inner ear consists of a cochlea, the semicircular canals and the auditory nerve

  2. the middle ear is an air filled cavity that consists of an ear drum and three tiny interconnected bones the hammer, anvil and stirrup

  3. the human ear consists of three basic parts - outer ear, middle ear and inner ear

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of the options are correct.

The inner ear consists of a cochlea, the semicircular canals and the auditory nerve.
The middle ear is an air filled cavity that consists of an ear drum and three tiny interconnected bones the hammer, anvil and stirrup.
The human ear consists of three basic parts - outer ear, middle ear and inner ear.

Multiple choice how humans hear sound human ear study of sound sound physics

State whether given statement is True or False :
There is no possibility of having mixed hearing loss with both conductive and sensori-neural element.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is a false statement. It is possible to have a mixed hearing loss.

Multiple choice how humans hear sound human ear study of sound sound physics

Why do we lose hearing while yawning?

  1. Muscles around middle ear contracts

  2. Muscles around middle ear expands

  3. Muscles around inner ear contracts

  4. Muscles around inner ear expands
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Muscles around middle ear contracts while yawning. So, we are not able to hear while yawning.

Multiple choice how humans hear sound human ear study of sound sound physics

How does the sound produced by a vibrating object in a medium reach your ear?

  1. Through electron transfer

  2. Through the vibration of particles

  3. Sound waves don't need a medium

  4. Not enough data
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When an object vibrates, it vibrates the neighbouring particles of the medium. These vibrating particles then vibrate to the adjacent particles. Vibrations in an object create disturbance in the medium and consequently compressions and rarefactions.  In this way, vibrations produced by an object are transferred from one particle to another in the form of compressions and rarefactions till it reaches our ear.
Region of high pressure and high density is called compression and region of low pressure and low density in the air is called rarefaction. As the object continues to vibrate, it produces a series of successive compression and rarefaction in the air, thus, propagating sound through the air and finally reaches our ears.

Multiple choice how humans hear sound human ear study of sound sound physics

The persistence of hearing for human beings is not more than

  1. 1 s
  2. $\displaystyle \frac{1}{5}\:s$
  3. $\displaystyle \frac{1}{10}\:s$
  4. $\displaystyle \frac{1}{2}\:s$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sensation of hearing of any sound persists in our brain for 0.1s.This is called the persistence of hearing.

so the answer is C.

Multiple choice how humans hear sound human ear study of sound sound physics

Calculate he minimum distance to hear an echo.(taking the velocity of sound in air to be $330 {ms}^{-1}$)

  1. 12.8 m

  2. 24 m

  3. 8.6 m

  4. 17.5 m
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To hear an echo, sound must travel to the obstacle and back. The minimum time for human ear persistence is 0.1 seconds. Distance = (speed * time) / 2 = (330 * 0.1) / 2 = 16.5 meters. 17.5 meters is the closest provided option.