Waves Test - 10...

Assertion The change in air pressure effect the speed of sound.
Reason The speed of sound in a gas is proportional to square root of pressure.

Assertion Solids can support both longitudinal and transverse waves but only longitudinal waves can propagate in gases.
ReasonFor the propagation of transverse waves, medium must also necessarily have the property of rigidity.

Assertion Under given conditions of pressure and temperature, sound travels faster in a monoatomic gas than in diatomic gas.
Reason Opposition for wave to travel is more in diatomic gas than monoatomic gas.

Assertion The speed of sound in solids is maximum though their density is large.
ReasonThe coefficient of elasticity of solid is large.

Assertion On a rainy day sound travels slower than on a dry day.
Reason When moisture is present in air the density of air increases.

Assertion Sound produced by an open organ pipe is richer than the sound produced by a closed organ pipe.
Reason Outside air can enter the pipe from both ends, in case of open organ pipe.

Assertion It is not possible to have interference between the waves produced by two violins.
Reason For interference of two waves the phase difference between the waves must remain constant.

Assertion Like sound, light can not propagate in vacuum.
Reason Sound is a square wave. It propagates in a medium by a virtue of damping oscillation.

Assertion In the case of a stationary wave, a person hear a loud sound at the nodes as compared to the antinodes.
Reason In a stationary wave all the particles of the medium vibrate in phase.