Sound MCQ Questions Class 9 Science Chapter 12
NCERT MCQ Questions for Class 9 Science Chapter 12 Sound. Sound MCQ Questions with Answers from Class 9 Science.
Sound MCQ Questions Class 9 Science Chapter 12
Sound Multiple Choice Questions with Answers Class 9 Science Chapter 12 PDF is available.
1.) Sound can be transferred through
a) Solid
b) Liquid
c) Gases
d) All of these
Answer: d) All of these
2.) The SI unit of frequency is —
a) Hertz
b) Per second
c) Meter/ second
d) Both a) and b)
Answer: d) Both a) and b)
3.) Loudness or softness of a sound is depend on
a) Amplitude
b) Frequency
c) Type of a wave
d) None of these
Answer: a) Amplitude
4.) Amplitude of the wave is depend on
a) Nature of wave
b) Force with which an object is made tovibrate
c) Displacement of the sound wave
d) Frequency of a wave
Answer: b) Force with which an object is made to vibrate
5.) The speed of sound is greater in
a) Nickel
b) Ethanol
c) Air
d) Sulphur dioxide
Answer: a) Nickel
In case you are missed :- Previous Chapter MCQ Questions
6.) Horns of the vehicles are based on the principle of
a) Echo
b) Multiple reflections of sound
c) Ultrasound waves
d) None of these
Answer: b) Multiple reflections of sound
7.) Children under age of 5 years can hear sound upto
a) 10 kHz
b) 20 2Hz
c) 25 kHz
d) 30 kHz
Answer: c) 25 kHZ
8.) Rhinoceroses communicate using
a) Ultrasound waves
b) Infrasound waves
c) Audible sound waves
d) All of the above
Answer: b) Infrasound waves.
9.) The frequency of ultrasound waves is
a) Less than audible sound waves
b) Greater than audible sound waves
c) Equal to or less than sound waves
d) None of these
Answer: b) Greater than audible sound waves
10) If the pendulum oscillate 78 times in one minute then the frequency of that pendulum will be—
a) 2 Hz
b) 1.5 Hz
c) 1.3 Hz
d) 1.2 Hz
Answer: c) 1.3 Hz
Given, Number of oscillations = n = 78,
Time = 1 minute = 60 seconds
As we know that,
Frequency = No of oscillations/time
Frequency = 78/60
Frequency = 1.3 Hz
In case you are missed :- Next Chapter MCQ Questions
