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Test: Sound - 1 - UPSC MCQ


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20 Questions MCQ Test Science & Technology for UPSC CSE - Test: Sound - 1

Test: Sound - 1 for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Sound - 1 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Sound - 1 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Sound - 1 below.
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Test: Sound - 1 - Question 1

Pitch of sound depends upon

Detailed Solution for Test: Sound - 1 - Question 1

If the tension in the string is increased, the pitch (the shrillness) becomes higher. Increasing the tension, also increases the frequency of vibration. Therefore, pitch is intimately related to frequency

Test: Sound - 1 - Question 2

What is the length of vocal cords in men?

Detailed Solution for Test: Sound - 1 - Question 2

The length of the vocal chords differs in men and women, which is why there is difference in the quality of their voice. The length of the vocal chord in men is approximately 20 mm and in women it is 15 mm.

Test: Sound - 1 - Question 3

Sound is produced by

Detailed Solution for Test: Sound - 1 - Question 3
  • Sound is produced by vibration of object.
  • Vibration creates disturbance in medium which reaches to observer ear through air, water or solid medium.
  • In human, muscles push air up from lungs and through the narrow opening between the vocal cords. The force of the air causes the vocal cords to vibrate. The vibrating vocal cords produce sound waves.
Test: Sound - 1 - Question 4

Sound is kind of

Detailed Solution for Test: Sound - 1 - Question 4

Sound is a form of energy that propagates through matter, typically through the vibration of particles in a medium (such as air, water, or solids).

Test: Sound - 1 - Question 5

When a tightly stretched band is plucked, it

Detailed Solution for Test: Sound - 1 - Question 5

When a tightly stretched band is plucked, it vibrate and produce sound due to disturbance in medium. When it stops vibrating, it does not produce any sound.

Test: Sound - 1 - Question 6

Which of the following factor influence speed of sound most?

Detailed Solution for Test: Sound - 1 - Question 6

Speed of sound depends upon nature of medium, temperature, humidity and source of sound but nature of medium influence the speed of sound most. Sound travels faster in solid medium than air and water.

Test: Sound - 1 - Question 7

 1 hertz is equal to

Detailed Solution for Test: Sound - 1 - Question 7

1Hz= 1 vibration/second

1 minute=60 seconds
Hence, 1 hertz = 60 vibrations /minute

Test: Sound - 1 - Question 8

In most of the cases vibration of objects are not visible because

Detailed Solution for Test: Sound - 1 - Question 8
  • The vibrations of object are not visible because in most of the cases amplitude of waves are very small.
  • The vibrations are easily visible when amplitude of waves is high.
  • Amplitude is the maximum displacement from mean position.
Test: Sound - 1 - Question 9

Loudness of sound depends upon its

Detailed Solution for Test: Sound - 1 - Question 9
  • Loudness is directly proportional to the square of the amplitude of sound waves.
  • If the amplitude is high then sound will be louder and the sound will be feeble if the amplitude is low.
  • Loudness is measured in units called decibels. 
Test: Sound - 1 - Question 10

Vibrating part of flute is

Detailed Solution for Test: Sound - 1 - Question 10

Sound is produced by vibration of body. In flute, the vibrating part is air column inside the flute.

Test: Sound - 1 - Question 11

How is sound produced?

Detailed Solution for Test: Sound - 1 - Question 11

Sound is created when something vibrates. Imagine a bell ringing - it shakes or vibrates, making sound. When you hit a drum, it vibrates and makes noise. So, when things move back and forth quickly, they create sound.

Test: Sound - 1 - Question 12

When a tightly stretched band is plucked, it __________ and produces sound.

Detailed Solution for Test: Sound - 1 - Question 12

When you stretch a rubber band and let it go, it moves back and forth very quickly. This movement is called vibrating. When it vibrates, it makes a sound. So, when a tightly stretched band is plucked, it vibrates and produces sound.

Test: Sound - 1 - Question 13

State whether the following statement is True or False:

Sound is produced by a vibrating body.

Detailed Solution for Test: Sound - 1 - Question 13
  • When something vibrates or moves back and forth quickly, it makes sound. Just like when you pluck a rubber band and it vibrates, it creates sound. You can even try this with a metal dish and see the water in it move when you strike it. So, when something vibrates, it makes sound.
  • So, the statement "Sound is produced by a vibrating body" is True.
Test: Sound - 1 - Question 14

How is sound produced by humans?

Detailed Solution for Test: Sound - 1 - Question 14

Humans produce sound using a special part in their throat called the voice box or larynx. This part helps us talk, sing, and make different sounds. When we talk or sing, the air from our lungs makes the vocal cords in the voice box vibrate, creating sound.

Test: Sound - 1 - Question 15

Sound needs a ______ for propagation.

  • Medium
  • Source
  • Vibration
  • Frequency
Detailed Solution for Test: Sound - 1 - Question 15

Sound needs a medium, like air or water, to travel from one place to another. It cannot travel through a vacuum, which is an empty space without any air.

Test: Sound - 1 - Question 16

State whether the following statement is True or False
Sound can travel through solids.

Detailed Solution for Test: Sound - 1 - Question 16
  • Yes, sound can travel through solids. When you tap a metal spoon against a glass, the sound you hear is traveling through the solid metal and glass.
  • Just like how you can hear someone knocking on a door even if you are not in the same room, sound can travel through solid objects like walls, doors, and even metal rods.
  • So, it's true that sound can travel through solids!
Test: Sound - 1 - Question 17

The eardrum is like a stretched _____ sheet.

Detailed Solution for Test: Sound - 1 - Question 17

The eardrum is similar to a stretched rubber sheet. It vibrates when sound reaches it, helping us hear sounds around us.

Test: Sound - 1 - Question 18

What is the range of frequencies that the human ear can typically hear?

Detailed Solution for Test: Sound - 1 - Question 18

Our ears can usually hear sounds that range from 20 to 20,000 vibrations per second. This means we can hear many different sounds around us, from music to voices to noises like horns or construction sounds. It's like our ears have a special range for hearing different things!

Test: Sound - 1 - Question 19

Dogs can hear sounds of frequencies higher than __________ Hz.

Detailed Solution for Test: Sound - 1 - Question 19

Dogs have the ability to hear sounds that are higher than 20,000 vibrations per second. This means they can hear sounds that are very high-pitched, which humans cannot hear because they are too high for our ears to pick up.

Test: Sound - 1 - Question 20

State whether the following statement is True or False:

We can hear sounds of frequencies higher than about 20,000 vibrations per second (20 kHz).

Detailed Solution for Test: Sound - 1 - Question 20
  • False. The statement is False. Sounds of frequencies higher than about 20,000 vibrations per second (20 kHz) are not audible to the human ear. Only sounds within the range of roughly 20 to 20,000 Hz can be heard by humans.
  • For example, dogs can hear sounds of frequencies higher than 20,000 Hz, but we cannot perceive them. This is why police use high-frequency whistles that dogs can hear but humans cannot.
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