Learn › Homi Bhabha Class 6 · Physics › Sound
Sound — Homi Bhabha Class 6 Physics MCQs with Solutions
Free Homi Bhabha Class 6 Physics Sound MCQs with step-by-step solutions covering Production & Propagation of Sound, Pitch & Loudness, Sources of Sound, Noise Pollution. Practise online on Prepizo — no login needed.
▶ Practise Sound online (free)
Subtopics
Sample questions with solutions
Q1 — Production & Propagation of Sound · easy · theory
Sound is produced when an object does what?
A. Vibrates (shakes back and forth) ✓ Correct
B. Changes its colour
C. Becomes cold
D. Stays perfectly still
Solution: All sounds are made by objects that vibrate, or shake to and fro.
Q2 — Production & Propagation of Sound · easy · theory
When you beat a drum, what actually makes the sound?
A. The colour of the drum
B. The vibrating drum skin ✓ Correct
C. The drummer’s shirt
D. The wooden stand
Solution: The stretched drum skin vibrates when struck, and this makes the sound.
Q3 — Production & Propagation of Sound · easy · theory
If you gently touch a bell just after it rings, what do you feel?
A. It is completely still
B. It has turned very cold
C. It has become soft
D. It is trembling (vibrating) ✓ Correct
Solution: A ringing bell is still vibrating, so you can feel it trembling.
Q4 — Production & Propagation of Sound · easy · theory
Sound needs something to travel through. This something is called a …
A. Shadow
B. Medium (like air, water or a solid) ✓ Correct
C. Colour
D. Vacuum
Solution: Sound needs a medium such as air, water or a solid to travel from place to place.
Q5 — Pitch & Loudness · easy · theory
The pitch of a sound tells us whether it is …
A. Near or far
B. Hot or cold
C. Loud or soft
D. High (shrill) or low (deep) ✓ Correct
Solution: Pitch tells us how high (shrill) or how low (deep) a sound is.
Q6 — Pitch & Loudness · easy · theory
The loudness of a sound tells us …
A. How loud or soft it is ✓ Correct
B. What colour it is
C. How high or low it is
D. How heavy it is
Solution: Loudness tells us how loud or soft a sound is, not how high or low.
Q7 — Pitch & Loudness · easy · theory
Which of these makes a high-pitched (thin, shrill) sound?
A. The beat of a big drum
B. The buzzing of a mosquito ✓ Correct
C. The horn of a truck
D. The roar of a lion
Solution: A mosquito’s buzz is thin and shrill, so it has a high pitch.
Q8 — Pitch & Loudness · easy · theory
Which of these makes a low-pitched (deep) sound?
A. A chirping sparrow
B. A small bell
C. A lion’s roar ✓ Correct
D. A tiny whistle
Solution: A lion’s roar is deep and heavy, so it has a low pitch.
Q9 — Sources of Sound · easy · theory
In a guitar or a sitar, what vibrates to make the sound?
A. The stretched strings ✓ Correct
B. The wooden legs
C. The player’s cap
D. The paint on it
Solution: String instruments make sound when their stretched strings vibrate.
Q10 — Sources of Sound · easy · theory
In a flute, what vibrates to make the music?
A. The player’s fingers
B. The table it rests on
C. The air inside it ✓ Correct
D. The metal keys only
Solution: A flute makes sound when the air (air column) inside it vibrates.
Q11 — Sources of Sound · easy · theory
In a tabla or a drum, what vibrates to produce sound?
A. The floor below it
B. The stretched skin on top ✓ Correct
C. The colour of the body
D. The player’s shirt
Solution: The stretched skin (membrane) of a drum or tabla vibrates to make sound.
Q12 — Sources of Sound · easy · theory
In human beings, our voice is produced by the …
A. Ears
B. Nose only
C. Eyes
D. Voice box in the throat ✓ Correct
Solution: The voice box in our throat vibrates when we speak, producing our voice.
Q13 — Noise Pollution · easy · theory
Unwanted, unpleasant and very loud sound is called …
A. Music
B. Silence
C. Noise ✓ Correct
D. A whisper
Solution: Unwanted, unpleasant loud sound is called noise.
Q14 — Noise Pollution · easy · theory
Which of these is an example of a pleasant sound (not noise)?
A. Soft music ✓ Correct
B. A running factory machine
C. Bursting of loud crackers
D. Loud honking in a traffic jam
Solution: Soft music is pleasant to hear, while the others are unwanted loud noise.
Q15 — Noise Pollution · easy · theory
Which of these causes noise pollution?
A. Soft rainfall
B. Loudspeakers played at very high volume ✓ Correct
C. A quiet library
D. A gentle breeze
Solution: Very loud loudspeakers make unwanted noise, which causes noise pollution.
Q16 — Noise Pollution · easy · theory
Too much noise around us harms which sense organ the most?
A. The skin
B. The tongue
C. The ears ✓ Correct
D. The eyes
Solution: Loud noise mostly affects our ears and can damage our hearing.
Q17 — Production & Propagation of Sound · hard · theory
Astronauts standing on the Moon cannot hear each other’s voices directly. Why?
A. There is no air on the Moon to carry the sound ✓ Correct
B. They speak too softly
C. Sound travels too fast there
D. The Moon is too cold for sound
Solution: The Moon has no air, so there is no medium to carry sound between them.
Q18 — Production & Propagation of Sound · hard · numerical
Sound travels about 340 metres in one second in air. About how far will it travel in 3 seconds?
A. About 1020 metres ✓ Correct
B. About 340 metres
C. About 680 metres
D. About 113 metres
Solution: Distance = speed × time = 340 × 3 = 1020 metres.
Q19 — Pitch & Loudness · hard · theory
Two guitar strings are plucked with the same force. The thin, tightly stretched string is plucked. Compared to a thick, loose string, its sound will be …
A. Completely silent
B. Exactly the same pitch
C. Lower in pitch
D. Higher in pitch ✓ Correct
Solution: A thin, tight string vibrates faster, so it gives a higher-pitched sound.
Q20 — Pitch & Loudness · hard · theory
A sound can be loud and yet have a low pitch. Which example shows this best?
A. A faint, high ring of a small bell
B. The deep, loud beat of a big bass drum ✓ Correct
C. A soft, high whistle far away
D. A quiet, high squeak of a mouse
Solution: A bass drum is loud (high loudness) but deep (low pitch), showing the two are different things.
Q21 — Sources of Sound · hard · theory
A honeybee makes a buzzing sound while flying, even though it has no voice box. What produces this sound?
A. Its fast-vibrating wings ✓ Correct
B. The flowers it visits
C. Its coloured body
D. The honey inside it
Solution: The bee’s wings vibrate very fast as it flies, and this makes the buzzing sound.
Q22 — Sources of Sound · hard · theory
A veena, a violin and a guitar all belong to the same family of instruments because they all make sound using …
A. Vibrating stretched skins
B. Electric motors
C. Vibrating air columns
D. Vibrating strings ✓ Correct
Solution: All three are string instruments, making sound through vibrating strings.
Q23 — Noise Pollution · hard · theory
Loudness is measured in decibels (dB). Very high-decibel sounds heard for a long time are dangerous because they …
A. Make us grow taller
B. Cool down our body
C. Improve our hearing
D. Can damage our hearing ✓ Correct
Solution: Listening to very loud (high-decibel) sounds for long can damage the ears and reduce hearing.
Q24 — Noise Pollution · hard · theory
A hospital has a ‘Silence Zone’ sign near it. This is mainly to …
A. Make the area look nicer
B. Save electricity
C. Stop people from walking there
D. Protect patients from harmful noise so they can rest ✓ Correct
Solution: A silence zone keeps noise low so that patients can rest and recover in peace.
Q25 — Production & Propagation of Sound · medium · theory
Can sound travel through a vacuum (empty space with no air)?
A. No, sound cannot travel without a medium ✓ Correct
B. Yes, it travels best there
C. Yes, but only at night
D. Yes, faster than in air
Solution: Without a medium there is nothing to carry the vibrations, so sound cannot travel through a vacuum.
Q26 — Production & Propagation of Sound · medium · theory
A ringing alarm clock is put inside a jar and all the air is pumped out. What happens to its sound?
A. It turns into light
B. It fades away because there is no air to carry it ✓ Correct
C. It becomes much louder
D. It stays exactly the same
Solution: With no air left in the jar, there is no medium to carry the sound, so it fades away.
Q27 — Production & Propagation of Sound · medium · theory
Through which of these does sound travel the fastest?
A. Water (liquid)
B. Air (gas)
C. A steel rod (solid) ✓ Correct
D. Empty space
Solution: Sound travels fastest through solids because their particles are packed closely together.
Q28 — Production & Propagation of Sound · medium · theory
Two children talk using a ‘string telephone’ made of two cups joined by a tight string. The sound reaches the other cup because …
A. The cups are coloured
B. The tight string carries the vibrations ✓ Correct
C. The air inside the cups is removed
D. The string is very long
Solution: The vibrations of the voice travel along the tight string (a solid) to the other cup.
Q29 — Pitch & Loudness · medium · theory
The loudness of sound is measured in units called …
A. Metres
B. Litres
C. Degrees
D. Decibels (dB) ✓ Correct
Solution: Loudness is measured in decibels, written as dB.
Q30 — Pitch & Loudness · medium · theory
When you hit a drum harder, the sound becomes louder. This happens because the drum skin now vibrates with …
A. A larger amplitude (bigger to-and-fro movement) ✓ Correct
B. A brighter colour
C. No movement at all
D. A smaller amplitude
Solution: A bigger amplitude (larger vibration) makes a louder sound.