Question

The number of oscillations completed per second is called

Answer 1

1. Frequency is the number of vibrations, oscillations, or the number of occurrences of a repeating event per unit of time.
2. The frequency is measured in terms of Hertz.
3. In sound, the frequency is in the form of waves, so here frequency is defined as the number of waves that pass a fixed point in a given amount of time.

Hence, the number of oscillations completed per second is called frequency.