Samacheer Kalvi Class 10 Science Acoustics Questions & Answers - 1

Question: 1

Sound energy passing per second through a unit area held perpendicular is called

(A) frequency

(B) amplitude

(C) quality

(D) intensity

Question: 2

Sound propagates maximum in

(A) solid

(B) liquid

(C) gas

(D) all

Question: 3

What is the frequency range of audio sound?

(A) 1.5 Hz to 20 kHz

(B) 10 Hz to 15 kHz

(C) 20 Hz to 25 kHz

(D) 20 Hz to 20 kHz

Question: 4

Sound travels with a velocity of ___ air.

(A) 330 ms^-1

(B) 331 ms^-1

(C) 332 ms^-1

(D) 336 ms^-1

Question: 5

The speed of sound in air is 300 m/s. what is the frequency as heard by the human ear?

(A) 1 Hz

(B) 10,000 Hz

(C) 1,00,000 Hz

(D) 0.001 Hz

Question: 6

The frequency, which is audible to the human ear is

(A) 20 kHz

(B) 50 kHz

(C) 15000 kHz

(D) 10000 kHz

Question: 7

Sound waves in air are

(A) longitudinal

(B) transverse

(C) both a and b

(D) none of these

Question: 8

Distance between two consecutive compression is ___

(A) λ

(B) $${λ}/{2}$$

(C) $${λ}/{4}$$

(D) 2λ

Question: 9

When a sound wave travels through air, the air particles

(A) do not vibrate

(B) vibrate perpendicular to the direction of the wave motion

(C) vibrate but not in any fixed direction

(D) vibrate along the direction of the wave motion

Question: 10

The region of a sound wave having low pressure is

(A) compression

(B) rarefaction

(C) refraction

(D) interference