10th Science Chapter -05 Acoustics Creative One Mark Question and Answers Part-04
10th Science Chapter -05 Acoustics Creative One Mark Question and Answers Part-04
01..what is the frequency range of audible sound sound
a) 20 Hz to 20 kHz
b) 1.5 Hz to 20 kHz
c) 10 Hz to 15 kHz
d) 20 Hz to 25 kHz
Correct answer
20 Hz to 20 kHz
02.sound travels faster in air than solid
a) true
b) false
Correct answer
false
03.Before playing guitar guitarist adjust the tension and pluck the string by doing so he is adjusting
a) intensity of sound only
b) amplitude
c) frequency
d) loudness of sound
Correct answer
frequency
04.Velocity of sound in the atmosphere of a planet is 500 ms^-1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be
a) 17 m
b) 20 m
c) 25 m
d) 50 m
Correct answer
25 m
05.A source emits a frequency of 1 kHz is moving toward a rest listener with a speed of 0.9 V where V is speed of sound wave. The frequency heard by the listener is
10 Hz
0.1 Hz
100 Hz
10 kHz
Correct answer
10 kHz
06.Time in which a wave moves a distance equal to wavelength is frequen
a) True
b) False
Correct answer
False
07.The speed of sound in air is 300 m/s what is frequency as heard by the human ear?
0.001 Hz
1 Hz
10,000 Hz
1,00,000 Hz
Correct answer
10,000 Hz
08.The speed f sound in air at 22 c is 344 m/s
a) true
b) False
Correct answer
true
09.Infrasonic sound is used to defect objects in ocean
a) true
b) False
Correct answer
False
10.The region of a sound wave having low pressure is
a) interference
b) refraction
c) rarefaction
d) compression
Correct answer
rarefaction
11.the region f increased pressure in wave called
a) crest
b) through
c) compression
d) particle
Correct answer
compression
12.Sound can travel in
a) air
b) any material
c) vacum
d) none
Correct answer
any material
13.To hear a distinct echo the minute distance below source of rigid surface should be 27 m
a) true
b) False
Correct answer
False
14.pitch of sound depends on the frequency of the wave
a) true
b) False
Correct answer
true
15.Sound waves in air are longitudinal in nature
a) true
b) false
Correct answer
true
16.Sound propagates maximum in
a) gas
b) liquid
c) solid
d) all
Correct answer
solid
17..Velocity of sound in a gas is directly proportional to square root of temperature
a) true
b) False
Correct answer
true