10th Science Chapter -05 Acoustics Creative One Mark Question and Answers Part-01
10th Science Chapter -05 Acoustics Creative One Mark Question and Answers Part-01
01.The sound waves are reflected from an obstacle into the same medium from which they were incident which of the following changes?
a) speed
b) frequency
c) wavelength
d) none of these
Correct answer
none of these
02.The velocity of sound in gases is affected by
a) temperature
b) density
c) relative humidity
d) all the above
Correct answer
all the above
03.Doppler effect n sound is due to
a) motion of source
b) motion of the observer
c) relative motion of source and observer
d) none of these
Correct answer
relative motion of source and observer
04.what does it mean a wave's amplitude increases?
a) Its frequency also increases
b) It is moving in denser medium
c) Its wavelength gets longer
d) It carries more energy
Correct answer
It carries more energy
05.Infra sound is produced during earthquake
a) true
b) false
Correct answer
true
06.Velocity of in a gaseous medium is 330 ms^-1. if the pressure is increased by 4 times without causing in the temperature, the velocity of sound in the gas is
a) 330 ms^-1
b) 660 ms^-1
c) 156 ms^-1
d) 990 ms^-1
Correct answer
330 ms^-1
07.sound waves follow the same laws of reflection as light
a) true
b) False
Correct answer
true
08.Which voice is likely to have minute frequency?
a) baby girl
b) boy
c) A man
d) A woman
Correct answer
A man
09.How long sound persists in our ears?
a) 0 of a sound
b) 1/9 s
c) 1/8 s
d) 1/7 s
Correct answer
0 of a sound
10.sound can propagate through gaseous medium only
a) true
b) false
Correct answer
false
11.Dog can receive sound upto_____ kHz
a) 20
b) 25
c) 10
d) 15
Correct answer
25
12.sound from long distance cannot be heard clearly during rainy reasons
a) true
b) False
Correct answer
False
13.The speed f sound in air at 0 is 331 ms^-1
a) true
b) false
Correct answer
true
14.Earthquake produce
a) Ultrasound
b) Infrasound
c) audible sound
d) none
Correct answer
Infrasound
15.Bats deflect from the obs in their path by receiving the reflected _____ waves
a) radio
b) ultrasonic
c) electromagnetic
d) infrasonic
Correct answer
ultrasonic
16..When sound travels through air, the air particles
a) do not vibrate
b) vibrate but not in any fixed direction
c) vibrate perpendicular to the direction of wave propagation
d) vibrate along the direction of wave propagation
Correct answer
vibrate along the direction of wave propagation
17..Loudness of sound varies directly with vibrating body's
a) intensity
b) amplitude
c) pitch
d) quality
Correct answer
amplitude
