Chapter 12 Sound
MCQs
Q 1.: Sound travels through which medium?
(A) Solid
(B) Liquid
(C) Gas
(D) All of the above
Option – D
Q 2.: On counting the number of compression or rarefaction crossing per unit time we can get
(A) Intensity of sound wave
(B) Speed of sound
(C) Wavelength of sound
(D) Frequency of sound
Option – D
Q 3.: When a body vibrates, it compresses the air surrounding and forms a high-density area known as__________.
(A) Refraction
(B) Reflection
(C) Rarefaction
(D) Compression
Option – D
Q 4.: The phenomenon where a sound produced is heard again due to reflection is called_________
(A) Sound bounce
(B) Mirage
(C) An echo
(D) Interference
Option – C
Q 5.: The number of compressions or rarefactions per unit time gives_______
(A) Frequency
(B) Time period
(C) Amplitude
(D) Pitch
Option – A
Q 6.: Sound waves in air is an example of__________
(A) Longitudinal wave
(B) Transverse wave
(C) Electromagnetic wave
(D) None of the options
Option – B
Q 7.: Mexican wave in a stadium is an example of
(A) Longitudinal wave
(B) Transverse wave
(C) Electromagnetic wave
(D) None of the options
Option – B
Q 8.: When the vibrating object moves backwards, it creates a region of low pressure called___________
(A) Refraction
(B) Reflection
(C) Rarefaction
(D) Retardation
Option – C
Q 9.: In SONAR, we use
(A) Ultrasonic waves
(B) Infrasonic waves
(C) Radio waves
(D) Audible sound waves
Option – A
Q 10.: Sound travels in air if
(A) Particles of medium travel from one place to another
(B) There is no moisture in the atmosphere
(C) Disturbance moves
(D) Both particles as well as disturbance travel from one place to another.
Option – C
Q 11.: When we change feeble sound to loud sound we increase its
(A) Frequency
(B) Amplitude
(C) Velocity
(D) Wavelength
Option – B