Sound Class 10 ICSE Physics MCQ Questions
Looking for Sound Class 10 ICSE Physics Chapter 7 MCQ Questions? If yes, You are the right page. Here we have provided ICSE class 10 physics chapter 7 multiple choice questions and answers. All MCQ are important.
1) Frequency of audible sound waves ranges from
a) below 20 Hz.
b) 20Hz to 20000 Hz
c) above 20000 Hz
d) 50Hz to 10000 Hz.
Ans-option (b)
2) Which sound waves are inaudible to human being
a) Infrasonic
b)ultrasonic
c) amplitude
d)Both (a) & (b)
Ans-option (d)
3) The wave velocity, frequency & wavelength are related as
a) v = fλ b) λ = vf
c) f=Lambada/v
d)v=Lambada/f
Ans-option (a)
4) An object is Vibrating at 4000 Hz. The time period of sound produced is
a) 0.0025 sec
b) 0.025sec
c)0.00025sec
d) 0.0005 sec
Ans- option (c)
f=6000Hz
f=1/T
T=1/f =1/4000
= 0.00025sec
5) The speed of sound is maximum in
a) copper. b)air
c) water. d) vacuum
Ans-option (a)
6) forming compression & rarefaction in medium the wave is
a) transverse
b) latitudinal
c) longitudinal
d) Mechanical
Ans -option (c)
7) which statement is incorrect about sound wave.
a) sound waves Obey law of reflection.
b) These are mechanical waves
c) They cannot travel in vacuum
d) sound waves do not require medium for propagation
Ans-option (d)
8) Dolphin detect its enemy by emitting
a) ultrasonic waves
b) infrasonic waves
c) Audible waves
d) Both (b) & (c)
Ans- option (a)
9) Sonar is used for
a) measuring distance, velocity and direction of object in air
b) measuring speed & direction of object in water
c) measuring speed & direction of object in air d) measuring distance, velocity and direction of object in water. Ans-option(d)
10) The natural vibrations of a body occur in
a) Vacuum. b) water
c)air. d)none of these
Ans-option (a)
11) In an organ pipe with one end closed the frequency are in the ratio
a) 1:2:3. b) 1:3:5
c)2:4:8 d)4:1:3
Ans-option (b)
12) The periodic Vibrations of a body in absence of external force is called
a) Damped vibration
b) forced vibration
c) Natural vibration
d) both (a) & (b)
Ans- Option (c)
13) A simple pendulum oscillate in air is an example of
a) Damped Vibration.
b) forced vibration
c) resonant vibration
d) Natural Vibration
Ans-option (a)
14) In which Vibration their is some loss of energy in form of heat
a) forced b) free
c) Natural. d)Damped
Ans-option (d)
15) In damped Vibration which force act on vibrating body
a) restoring force
b) frictional force
c) external periodic force
d) Both (a)& (b)
Ans-option(d)
16) If frequency of external force is equal to natural frequency ,the amplitude of oscillation is
a) small b) large
c) zero .d) equal
Ans-option (b)
17) when a troop crosses a suspension bridge, the soldiers are asked to break their steps which phenomena is
a)resonance.
b) forced Vibration.
c)free vibration
d) Damped vibration
Ans-option (a)
18) The intensity of sound wave is proportional to
a) square of velocity and amplitude of vibration
b) square of frequency & amplitude of vibration
c) square of frequery & velocity of vibration
d) square of frequency and area of vibration
Ans-option (b)
19) The loudness of sound do not depend on
a) intensity
b) sensitivity
c) amplitude
d)none of these
. Ans-option (d)
20) The Pitch of sound increases if its frequency
a) increase
b) one-fourth
c) decrease
d) one
Ans-Option (a)
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