WAVES

Velocity of sound in air is

• faster in dry air than in moist air

• directly proportional to temperature

• directly proportional to pressure

• none of the above

If the density of oxygen is 16 times that of hydrogen, what will be corresponding ratio of their velocities of sound ?

• 1:4

• 16:1

• 4:1

• 1:16

Newton's assumed that sound waves travel through gas under

• adiabatic condition

• isothermal condition

• both

• none of above

Speed of Sound in solids as compared to gases

The velocity of sound in air at NTP is 330m/s. What will be its value when temperature is doubled and pressure is halved?

• 330m/s

• 165m/s

• 330√2m/s

• 660m/s

Which of the following has no effect on speed of sound in air

• temperature

• pressure

• density

• none of the above

As compared to air, speed of sound in liquid and solids is

• Lower

• faster

• equal

• zero

Laplace correction for velocity of sound is

• v=√ϒP/ ρ​​

• v=P/ ρ​​

• v=ϒP/ ρ​​

• v=√P/ ρ​​

Light can travel in vaccum but not sound,because

• speed of sound is very slow than light

• light waves are electromagnetic in nature

• sound waves are electromagnetic nature

• none of the above

The velocity of sound in a perfectly rigid body

• zero

• 333m/s

• infinite

• none of these