Test: Sound - 4


20 Questions MCQ Test Science Class 8 | Test: Sound - 4


Description
This mock test of Test: Sound - 4 for Class 8 helps you for every Class 8 entrance exam. This contains 20 Multiple Choice Questions for Class 8 Test: Sound - 4 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Sound - 4 quiz give you a good mix of easy questions and tough questions. Class 8 students definitely take this Test: Sound - 4 exercise for a better result in the exam. You can find other Test: Sound - 4 extra questions, long questions & short questions for Class 8 on EduRev as well by searching above.
QUESTION: 1

Eardrum is a part of:

Solution:

the sound producing organ of our body is larynx or the voice box and ear drum is not a part of it.We also know that ear drum is not a part of skeletal system skeletal system consists of bones and joints .We also know that eardrum is not a part of reproductive system. So show the option remains is the hearing organ and we know that the hearing organ of our body is ear and it has the eardrum which senses the vibrations and convert it into signals and transmit it to brain with the help of afferent nerves. So option "c"is the correct answer.

QUESTION: 2

The hearing range of human ear is:

Solution:
The frequency range of human ear is 20 Hz – 20000 Hz.
Time period = 1/frequency
T1 = 1/f1 = 1/(20 Hz) = 0.05 s
T2 = 1/f2 = 1/(20,000 Hz) = 0.00005 s
The range in terms of time period is 0.00005 s to 0.05 s
QUESTION: 3

The voice box is also called:

Solution:
QUESTION: 4

Large amplitude of sound vibrations will produce:

Solution: When the amplitude of vibration of Steel tumbler is large, the sound produced is very loud. The loudness of sound depends on the amplitude of vibration of sound producing objects.
a)When the amplitude of vibration is large ,the sound produced is loud.
QUESTION: 5

The pitch of sound depends on:

Solution:
QUESTION: 6

Sound is a kind of

Solution:
QUESTION: 7

To and fro motion of an object is called

Solution:
QUESTION: 8

Voice box or larynx of human produces

Solution: Answer is a because The airstream provides the energy for the vocal folds in the voice box to produce sound...the vibrate very fast from 100 to1000 times per second,depending on the pitch of sound we make.Pitch is determined by the length and tension of the vocal folds,which are controlled by muscles in the larynx.
QUESTION: 9

Sound propagates maximum in

Solution:

Sound propogates maximum in solid. The reason is that the particles are more closer to each other in a solid so transfer of sound  energy is faster in solid than in liquid or gas. 

QUESTION: 10

 Noise pollution is harmful for

Solution:
QUESTION: 11

Sound can travel in vacuum.

Solution:
QUESTION: 12

We can hear the sound of the frequency 20 Hz to 20,000 Hz.

Solution:

Humans can generally sense sounds at frequencies between 20 and 20,000 cycles per second, or hertz (Hz)—although this range shrinks as a person ages. Prolonged exposure to loud noises within the audible range have long been known to cause hearing loss over time.

QUESTION: 13

 The sound cannot travel in solid materials.

Solution:
QUESTION: 14

The sound is caused due to propagation of vibrations.

Solution:
QUESTION: 15

The pitch of a sound depends on the frequency of the waves.

Solution:
QUESTION: 16

Ghatam is a musical instrument.

Solution:
QUESTION: 17

Sound does not need a medium for propagation.

Solution:
QUESTION: 18

The number of oscillations per second is called amplitude.

Solution:

The commonly used unit for the no. Of oscillations  per second is the  Hertz.
So, the given statement is false

QUESTION: 19

The frequency determines the shrillness or pitch of a sound.

Solution:

The shrillness of sound is pitch. The pitch of the sound depends on the frequency of vibrations. The higher the frequency, the more shrill is the sound.

QUESTION: 20

The loudness is expressed in a unit called decibel.

Solution:

The loudness of sound is measured in units called  decibel (dB) . A decibel unit expresses the relative intensity if sounds on a scale from zero for the average least perceptible sound to about 100 dB, which is near the level most people find uncomfortably loud.

Similar Content

Related tests