Sound Wave MCQ

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    mcq on sound Waves for Students

    What is the low-pressure area formed when a vibrating body moves backward called?

    (a) Rarefaction

    (b) Compression

    (c) Depression

    (d) Hypertension

    Option a – Rarefaction

    When a sound wave moves from east to west, how do air particles move?

    (a) East-west

    (b) North-south

    (c) Vertically

    (d) None of these

    Option a – East-west

    The unit that determines how loud a sound is relates to

    (a) Meter

    (b) Hertz

    (c) Meter per second

    (d) Second

    Option b – Hertz

    At an outdoor concert, why can you still hear music when someone blocks your line of sight to the orchestra?

    (a) sound easily travels through a person’s head

    (b) The head size is small compared to the wavelength of sound

    (c) sound reflects off the head

    (d) The sound wavelength is much smaller than the head

    Option b – The head size is small compared to the wavelength of sound

    After an underwater blast occurs near the shore, who hears it first—person X underwater or person Y on land, both 1 km away?

    (a) X hears it first

    (b) Y hears it first

    (c) Both hear it simultaneously

    (d) Y doesn’t hear it at all

    Option a – X hears it first

    What kind of waves can be generated in a long spring?

    (a) Longitudinal only

    (b) Transverse only

    (c) Both longitudinal and transverse

    (d) Only electromagnetic

    Option c – Both longitudinal and transverse

    When a vibrating object moves forward, what high-pressure area does it create?

    (a) Rarefaction

    (b) Compression

    (c) Depression

    (d) Hypertension

    Option b – Compression

    Which statement is incorrect about sound?

    (a) It moves in straight lines

    (b) It is a type of energy

    (c) It propagates through waves

    (d) It travels faster in a vacuum than in air

    Option d – It travels faster in a vacuum than in air

    How do we recognize a friend’s voice?

    (a) By pitch

    (b) By quality

    (c) By intensity

    (d) By speed

    Option b – By quality

    What kind of pressure is present in a compression region?

    (a) Low pressure

    (b) Normal pressure

    (c) High pressure

    (d) Zero pressure

    Option c – High pressure

    When comparing echo during summer and winter, it is heard

    (a) Sooner in summer

    (b) Later in summer

    (c) At the same time

    (d) None of these

    Option a – Sooner in summer

    Echo is an example of

    (a) Reflected sound

    (b) Refracted sound

    (c) Polarized sound

    (d) None of these

    Option a – Reflected sound

    Sound waves are

    (a) Mechanical waves

    (b) Electromagnetic waves

    (c) Longitudinal waves

    (d) Both mechanical and longitudinal

    Option d – Both mechanical and longitudinal

    The sitar belongs to which category of musical instruments?

    (a) Wind

    (b) String

    (c) Percussion

    (d) Reed

    Option b – String

    The pressure in regions of compression or rarefaction depends on

    (a) The number of particles per volume

    (b) Particle density

    (c) The particle’s position

    (d) Both the number and density of particles

    Option d – Both the number and density of particles

    Ultrasonic waves are those with frequencies

    (a) Below 20 Hz

    (b) Between 20 and 20,000 Hz

    (c) Above 20,000 Hz

    (d) Higher than 20,000 MHz

    Option c – Above 20,000 Hz

    What does one hertz represent?

    (a) One cycle per second

    (b) One second

    (c) One meter per second

    (d) One second per meter

    Option a – One cycle per second

    When a particle in contact with a vibrating source moves and pushes the next particle, what does it do after?

    (a) Returns to its original place

    (b) Keeps pushing the next one

    (c) Travels through the entire medium

    (d) None of these

    Option a – Returns to its original place

    What is transferred by a wave as it travels?

    (a) Mass

    (b) Speed

    (c) Wavelength

    (d) energy

    Option d – energy

    In which medium does sound travel the fastest?

    (a) Water

    (b) Air

    (c) Metal

    (d) Vacuum

    Option c – Metal

    The ratio between an object’s speed and the speed of sound is called

    (a) Sonic index

    (b) Doppler ratio

    (c) Mach number

    (d) Refractive index

    Option c – Mach number

    Through which of the following can sound be transmitted?

    (a) Solids

    (b) Liquids

    (c) Gases

    (d) Any of the three above

    Option d – Any of the three above

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