NEET Physics Waves Velocity Of Sound MCQs

A sound wave travels from air into water. Which of the following properties of the sound wave remains unchanged?

On the superposition of two harmonic oscillations represented by ${X_1} = a\sin \left( {\omega t + {\phi _1}} \right)$ and ${X_2} = a\sin \left( {\omega t + {\phi _2}} \right)$a resulting oscillation with the same time period and same amplitude is obtained. The value of ${\phi _1} - {\phi _2}$ is

On the superposition of two harmonic oscillations represented by ${X_1} = a\sin \left( {\omega t + {\phi _1}} \right)$ and ${X_2} = a\sin \left( {\omega t + {\phi _2}} \right)$a resulting oscillation with the same time period and same amplitude is obtained. The value of ${\phi _1} - {\phi _2}$ is

If two coherent waves are represented by ${y_1} = 4\sin \omega t$ and ${y_2} = 3\sin \left( {\omega t + \pi /3} \right)$ interfere at a point, the amplitude of resulting wave will be about

If two coherent waves are represented by ${y_1} = 4\sin \omega t$ and ${y_2} = 3\sin \left( {\omega t + \pi /3} \right)$ interfere at a point, the amplitude of resulting wave will be about

Two sound waves (expressed in $CGS$ units) given by ${y_1} = 0.3\,\,\sin \frac{{2\pi }}{\lambda }\left( {vt - x} \right)$ and ${y_2} = 0.4\sin \frac{{2\pi }}{\lambda }\left( {vt - x + heta } \right)$ interfere. The resultant amplitude at a place where phase difference is $\pi /2$ will be

Two sound waves (expressed in $CGS$ units) given by ${y_1} = 0.3\,\,\sin \frac{{2\pi }}{\lambda }\left( {vt - x} \right)$ and ${y_2} = 0.4\sin \frac{{2\pi }}{\lambda }\left( {vt - x + heta } \right)$ interfere. The resultant amplitude at a place where phase difference is $\pi /2$ will be

From a point source, if amplitude of waves at a distance $r$ is A, its amplitude at a distance $2r$ will be

If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of

If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of