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Production & Propagation of Sound — Homi Bhabha Class 6 Physics MCQs with Solutions
Free Homi Bhabha Class 6 Physics Production & Propagation of Sound MCQs with step-by-step solutions (10 questions). Part of Sound. Practise online on Prepizo — no login needed.
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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 — 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.
Q6 — 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.
Q7 — 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.
Q8 — 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.
Q9 — 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.
Q10 — 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.