With respect to sound waves, which of the following statements are correct ?

(1) The maximum displacement of a particle on either side of its mean position is called the amplitude of the wave.

(2) Time taken by the particle of a medium to complete one vibration is called the time period.

(3) The number of vibrations made by the particle of a medium in one second is called the frequency.

(4) The frequency of a wave is different than the frequency of the source producing it.

1. 1
2. 1, 2
3. 1, 2, 3
4. 1, 2, 3 and 4

1, 2, 3

Reason — The frequency of a wave is same and not different as the frequency of the source producing it. All the above mentioned statements are true.