Multiple choice

The unit of frequency is ___.

  1. metre per second

  2. metre

  3. second

  4. hertz

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Hertz (Hz) is the SI unit of frequency, defined as one cycle per second. Frequency measures how many complete oscillations occur per unit time. Options A-C are units of distance or time, not frequency. Option D correctly identifies hertz.