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Question (31)

QN006692

Sound is produced due to:

(A) Reflection of light
(B) Vibrations of objects
(C) Chemical reactions only
(D) Magnetic force

Correct Answer: B

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Question (32)

QN006693

Sound requires a material medium for:

(A) Reflection
(B) Propagation
(C) Absorption
(D) Refraction

Correct Answer: B

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Question (33)

QN006694

Sound cannot travel through:

(A) Solids
(B) Liquids
(C) Gases
(D) Vacuum

Correct Answer: D

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Question (34)

QN006695

The to-and-fro motion of an object is called:

(A) Rotation
(B) Vibration
(C) Revolution
(D) Oscillation of light

Correct Answer: B

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Question (35)

QN006696

Sound travels fastest in:

(A) Vacuum
(B) Air
(C) Water
(D) Steel

Correct Answer: D

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Question (36)

QN006697

In air, sound travels in the form of:

(A) Transverse waves
(B) Longitudinal waves
(C) Electromagnetic waves
(D) Light waves

Correct Answer: B

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Question (37)

QN006698

A region of high pressure in a sound wave is called:

(A) Rarefaction
(B) Compression
(C) Reflection
(D) Echo

Correct Answer: B

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Question (38)

QN006699

A region of low pressure in a sound wave is called:

(A) Compression
(B) Reflection
(C) Rarefaction
(D) Refraction

Correct Answer: C

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Question (39)

QN006700

Sound waves travel by transfer of:

(A) Matter
(B) Energy
(C) Mass
(D) Heat only

Correct Answer: B

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Question (40)

QN006701

The speed of sound in air at room temperature is approximately:

(A) 34 m/s
(B) 340 m/s
(C) 3000 m/s
(D) 3 × 10⁸ m/s

Correct Answer: B

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