Characteristics of Sound MCQs
Characteristics of Sound – MCQs with Answers & Explanations
Class: 8 |
Subject: Science
Section: 13 – Sound
Topic: Characteristics of Sound
Board: CBSE Board Examination (Based on NCERT Syllabus)
Section: 13 – Sound
Topic: Characteristics of Sound
Board: CBSE Board Examination (Based on NCERT Syllabus)
1. The loudness of sound depends on:
Answer: B — Amplitude
Loudness is determined by the amplitude of vibration. Greater amplitude produces louder sound because more energy is carried by the wave.
Loudness is determined by the amplitude of vibration. Greater amplitude produces louder sound because more energy is carried by the wave.
2. Pitch of sound is related to:
Answer: B — Frequency
Pitch tells how shrill or deep a sound is. Higher frequency → higher pitch.
Pitch tells how shrill or deep a sound is. Higher frequency → higher pitch.
3. Unit of loudness is:
Answer: B — Decibel
Loudness is measured in decibels (dB), indicating sound intensity.
Loudness is measured in decibels (dB), indicating sound intensity.
4. The time taken for one vibration is called:
Answer: B — Time period
Time period = time for one complete oscillation. It is the inverse of frequency.
Time period = time for one complete oscillation. It is the inverse of frequency.
5. Frequency is measured in:
Answer: A — Hertz
1 Hz = 1 vibration per second.
1 Hz = 1 vibration per second.
6. Greater amplitude results in:
Answer: B — Louder sound
Amplitude controls loudness, not pitch or speed.
Amplitude controls loudness, not pitch or speed.
7. Higher frequency produces:
Answer: B — Shrill sound
High frequency → high pitch → shrill sound.
High frequency → high pitch → shrill sound.
8. Low pitch sound has:
Answer: B — Low frequency
Deep sounds like drum beats have low frequency.
Deep sounds like drum beats have low frequency.
9. The characteristic that differentiates male and female voices:
Answer: B — Pitch
Female voices usually have higher pitch than male voices.
Female voices usually have higher pitch than male voices.
10. Quality of sound is also called:
Answer: A — Timbre
It helps distinguish sounds from different sources even at same pitch and loudness.
It helps distinguish sounds from different sources even at same pitch and loudness.
11. Sound with small amplitude is:
Answer: B — Faint
Less energy → softer sound.
Less energy → softer sound.
12. Unit of time period:
Answer: A — Second
Time is measured in seconds.
Time is measured in seconds.
13. Audible sounds lie between:
Answer: B
Human hearing range.
Human hearing range.
14. Pitch increases when frequency:
Answer: B
Pitch ∝ Frequency.
Pitch ∝ Frequency.
15. Loudness depends on energy of:
Answer: A
More wave energy → louder sound.
More wave energy → louder sound.
16. Deep sound has:
Answer: B
Deep = low frequency.
Deep = low frequency.
17. Shrill sound example:
Answer: C
Whistle → high pitch.
Whistle → high pitch.
18. More vibrations per second means:
Answer: B
Frequency counts vibrations.
Frequency counts vibrations.
19. Characteristic helping identify instruments:
Answer: B
Quality/Timbre distinguishes sources.
Quality/Timbre distinguishes sources.
20. If amplitude doubles, loudness:
Answer: B
Greater amplitude → louder sound.
Greater amplitude → louder sound.
