Multiple choice

Which of the following is the unit of frequency?

  1. Ampere

  2. Joule

  3. Hertz

  4. Newton
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hertz (Hz) is the SI unit of frequency, defined as one cycle per second. It is named after the German physicist Heinrich Hertz who proved the existence of electromagnetic waves. Frequency measures the number of occurrences of a repeating event per unit of time.

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