10th Science Chapter -05 Acoustics Creative One Mark Question and Answers Part-03
10th Science Chapter -05 Acoustics Creative One Mark Question and Answers Part-03
01.The pitch of sound depends on
a) frequency
b) amplitude
c) both
d) none
Correct answer
frequency
02.The number of oscillations time is called frequency the wave
a) true
b) False
Correct answer
true
03.The higher the frequency of sound , the lower is its pitch
a) true
b) False
Correct answer
False
04.Repetition of sound due to reflection of original sound from a surface is called echo
a) true
b) False
Correct answer
true
05.At what velocity should a source of sound move towards a lostener so that apparent frequency is twice the actual frequency
a) 165 m / s
b) 330 m / s
c) 660 m / s
d) 110 m / s
Correct answer
165 m / s
06.The sound of less than 20 Hz is called ultrasound
a) true
b) False
Correct answer
False
07.Ultrasound waves compared to audible sound waves have
a) Lower frequency and shorter wavelength
b) Lower frequency and longer wavelength
c) higher frequency and longer wavelength
d) higher frequency and shorter wavelength
Correct answer
higher frequency and shorter wavelength
08.The frequency which is audible to the human ear is
a) 50 KHz
b) 20 KHz
c) 15000 KHz
d) 10000 KHz
Correct answer
20 KHz
09.SI unit of wavelength is cm
a) true
b) False
Correct answer
False
10.sound waves do ravel through
a) vaccum
b) solid
c) liquid
d) gases
Correct answer
vaccum
11.The maximum displacement f a vibrating particle in a medium is called wavelength
a) true
b) False
Correct answer
False
12.The rage f hearing in human om 20 Hz to 2000 Hz
a) true
b) False
Correct answer
False
13.The velocity of sound is independent of temperature
a) true
b) False
Correct answer
False
14.Sound waves in air are
a) Transverse
b) longitudinal
c) both a and b
d) none
Correct answer
longitudinal
15.The speed of sound in a medium depends upon
a) frequency
b) amplitude
c) wavelength
d) properties of the medium
Correct answer
properties of the medium
16..sound is a form of energy
a) true
b) False
Correct answer
true
17..The velocity of sound is high in gases than liquids
a) true
b) false
Correct answer
false