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# Test: Sound - 3

## 25 Questions MCQ Test Science Class 9 | Test: Sound - 3

Description
This mock test of Test: Sound - 3 for UPSC helps you for every UPSC entrance exam. This contains 25 Multiple Choice Questions for UPSC Test: Sound - 3 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Sound - 3 quiz give you a good mix of easy questions and tough questions. UPSC students definitely take this Test: Sound - 3 exercise for a better result in the exam. You can find other Test: Sound - 3 extra questions, long questions & short questions for UPSC on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

### The transfer of energy in a material medium due to the periodic motion of its particles is called:

Solution: Wave Motion and Velocity of Waves. Wave motion. It is a disturbance which travels in a material medium through the repeated periodic motion of the particles of the medium about their mean position.
QUESTION: 3

### Which is not the condition for hearing sound?

Solution:
QUESTION: 4

An instrument commonly used in laboratory to produce a sound of some particular frequency is :

Solution:

The correct answer is C as Tuning fork is an instrument used to produce sound in fixed frequency in laboratories. A tuning fork is an acoustic resonator in the form of a two-pronged fork with the prongs formed from a U-shaped bar of elastic metal .

QUESTION: 5

The sound waves in a medium are characterised by the:

Solution: A wave is a disturbance that moves through a medium when the particles of the medium set neighboring particles into motion. Since sound waves are characterized by the motion of particles in the medium, they are Mechanical Waves.
QUESTION: 6

The sound waves which travel in the air are called:

Solution: Do not conclude that sound is a transverse wave that has crests and troughs. Sound waves traveling through air are indeed longitudinal waves with compressions and rarefactions. As sound passes through air (or any fluid medium), the particles of air do not vibrate in a transverse manner.
QUESTION: 7

When a sound wave travels in the air, the physical quantity which is transferred from one place to the other is:

Solution: Basically sound is mechanical energy which is passed on from one to another particle.
QUESTION: 8

In case of longitudinal waves, the particles of medium vibrate:

Solution:
QUESTION: 9

In case of transverse waves the particles of a medium vibrate:

Solution:
QUESTION: 10

A longitudinal waves consists of:

Solution:
QUESTION: 11

A transverse wave consists of:

Solution:
QUESTION: 12

The longitudinal waves can propagate only in :

Solution: Because it always flow through a medium, since in longitudinal waves the molecules transfer the energy of the propagation to the nearby molecules.Since we know that molecules are present in the solid, liquids and gases, therefore it can propagate in all these states.
QUESTION: 13

Which of the following metal/s is/are not ductile?

Solution:
QUESTION: 14

A part of the longitudinal wave in which particles of medium are closer than the normal particles is called:

Solution:
QUESTION: 15

In the compression region of the medium in case of longitudinal wave:

Solution:
QUESTION: 16

A part of longitudinal wave in which particles of medium are farther away than the normal particles is called:

Solution:
QUESTION: 17

In case of a longitudinal wave, in the region of rarefaction :

Solution:
QUESTION: 18

In the region of compression or rarefaction, in a longitudinal wave the physical quantity which does not change is:

Solution:
QUESTION: 19

A slinky can produce in laboratory :

Solution:

A slinky can easily demonstrate the two basic types of waves, longitudinal & transverse. In a Longitudinal wave the particles move parallel to the direction the wave is moving. In a transverse wave the particles move at right angles to the direction of wave travel.

QUESTION: 20

In case of transverse wave :

Solution:

The highest part of the wave is called the crest. The lowest part is called the trough. The wave height is the overall vertical change in height between the crest and the trough and distance between two successive crests (or troughs) is the length of the wave or wavelength.

QUESTION: 21

In case of transverse wave:

Solution:
QUESTION: 22

The wavelength is the linear distance between the:

Solution:

The distance between two successive compression and distance between a compression and the adjoining rarefaction is called wavelength.

QUESTION: 23

In case of transverse wave the wavelength is the linear distance between :

Solution: The distance from a certain point on one wave to the same point on the next wave (e.g. distance between two consecutive wave crests or between two consecutive wave troughs). One half the distance from the crest to the trough. Wave amplitude is a more technical term for wave height and is used in engineering technology.
QUESTION: 24

The change in density/pressure of a medium from maximum value to minimum value and again to maximum value, due to the propagation of a longitudinal wave is called complete:

Solution:
An undamped spring–mass system is an oscillatory system
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. The term vibration is precisely used to describe mechanical oscillation. Familiar examples of oscillation include a swinging pendulum and alternating current.

Oscillations occur not only in mechanical systems but also in dynamic systems in virtually every area of science: for example the beating of the human heart (for circulation), business cycles in economics, predator–prey population cycles in ecology, geothermal geysers in geology, vibrating strings in musical instruments, periodic firing of nerve cells in the brain, and the periodic swelling of Cepheid variable stars in [astronomy]
QUESTION: 25

The number of oscillations passing through a point in unit time is called:

Solution: