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Test: Sound Wave - SSC CGL MCQ


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15 Questions MCQ Test General Awareness for SSC CGL - Test: Sound Wave

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

What term describes the form of energy that creates the sensation of hearing through vibrations?

Detailed Solution for Test: Sound Wave - Question 1

Sound is a form of energy that creates the sensation of hearing through vibrations. When an object vibrates, it causes the air particles around it to vibrate, creating sound waves. These sound waves travel through a medium and can be perceived by our ears, allowing us to hear various sounds in our environment.

Test: Sound Wave - Question 2

What type of waves have frequencies between 20 Hz and 20,000 Hz?

Detailed Solution for Test: Sound Wave - Question 2

Audible waves have frequencies between 20 Hz and 20,000 Hz, making them detectable by the human ear. These waves encompass the range of sounds that humans can perceive, from low-pitched to high-pitched sounds.

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Test: Sound Wave - Question 3

What is the speed of sound in water approximately?

Detailed Solution for Test: Sound Wave - Question 3

The speed of sound in water is around 1483 m/s. This speed is significantly faster than in air due to water's higher density compared to air, which allows sound waves to travel more efficiently.

Test: Sound Wave - Question 4

What is the characteristic of sound that identifies weak and loud sounds and is proportional to the square of the amplitude of vibration of the source?

Detailed Solution for Test: Sound Wave - Question 4

Intensity is the characteristic of sound that helps in distinguishing between weak and loud sounds. It is directly related to the square of the amplitude of vibration of the sound source. The greater the intensity, the louder the sound perceived by the human ear.

Test: Sound Wave - Question 5

What phenomenon is responsible for the bouncing back of sound when it strikes a hard surface?

Detailed Solution for Test: Sound Wave - Question 5

Reflection is the phenomenon where sound waves bounce back when they encounter a hard surface. This principle is fundamental to understanding echoes and the behavior of sound in various environments.

Test: Sound Wave - Question 6

What is the musical scale called where the frequencies of notes are in simple ratios to one another?

Detailed Solution for Test: Sound Wave - Question 6

The diatonic scale is a musical scale where the frequencies of notes are in simple ratios to one another. This scale is fundamental in music theory and serves as the basis for many melodies and harmonies.

Test: Sound Wave - Question 7

Which noise reduction system provides about 15 dB noise reduction?

Detailed Solution for Test: Sound Wave - Question 7

Dolby C is a noise reduction system that offers approximately 15 dB of noise reduction. This system is designed to reduce unwanted noise during audio recordings, enhancing the overall sound quality.

Test: Sound Wave - Question 8

What does SONAR stand for?

Detailed Solution for Test: Sound Wave - Question 8

SONAR stands for Sound Navigation And Ranging. This technology is widely used in various applications, such as measuring sea depth, detecting underwater objects, and locating submarines.

Test: Sound Wave - Question 9

Which part of the human ear collects sound from the surroundings?

Detailed Solution for Test: Sound Wave - Question 9

The pinna, also known as the outer ear, is responsible for collecting sound from the environment. It plays a crucial role in capturing sound waves and funneling them into the ear canal for further processing.

Test: Sound Wave - Question 10

What is the phenomenon called when sound waves show deviation from their original path when moving from one medium to another?

Detailed Solution for Test: Sound Wave - Question 10

Refraction is the phenomenon where sound waves exhibit deviation from their original path when transitioning from one medium to another. This behavior is due to variations in the speed of sound in different mediums.

Test: Sound Wave - Question 11

What is the interval between two consecutive sa notes in a musical scale called?

Detailed Solution for Test: Sound Wave - Question 11

The interval between two consecutive sa notes in a musical scale is called an octave. This interval represents a doubling or halving of the frequency of the note, resulting in a harmonic relationship between the two sa notes.

Test: Sound Wave - Question 12

What is the measure of sound level denoted by β = 10 log10 (I/I0) dB?

Detailed Solution for Test: Sound Wave - Question 12

Loudness is the measure of sound level represented by β = 10 log10 (I/I0) dB. It quantifies the perceived volume of a sound and is directly related to the intensity of the sound source.

Test: Sound Wave - Question 13

What type of waves have frequencies above 20,000 Hz?

Detailed Solution for Test: Sound Wave - Question 13

Ultrasonic waves have frequencies above 20,000 Hz, making them imperceptible to the human ear. These waves find applications in various fields such as medical imaging and industrial processes.

Test: Sound Wave - Question 14

What is the term for the spreading of sound waves around the edges of an obstacle?

Detailed Solution for Test: Sound Wave - Question 14

Diffraction is the phenomenon where sound waves bend around obstacles or edges, leading to the spreading of sound in different directions. This behavior allows sound to propagate around obstacles and reach areas that may be otherwise obstructed.

Test: Sound Wave - Question 15

What is the term for the process of converting pressure variations from sound waves into electrical signals in the inner ear?

Detailed Solution for Test: Sound Wave - Question 15

The cochlea in the inner ear is responsible for converting pressure variations from sound waves into electrical signals. This intricate process forms the basis of auditory perception and enables us to interpret sound signals in the brain.

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