Longitudinal waves can be produced in :

1. solids
2. liquids
3. gases
4. All of the above

The maximum displacement of the medium particle on either side of its mean position is called …………… of the wave.

1. frequency
2. time period
3. wavelength
4. amplitude

The time taken by a particle of a medium to complete its one vibration is called:

1. frequency
2. time period
3. wave velocity
4. amplitude

At compressions, the density and pressure of a medium is ……………, while at rarefactions the density and pressure of a medium is ……………

1. minimum, minimum
2. minimum, maximum
3. maximum, maximum
4. maximum, minimum