What is the SI unit of frequency?

Answer and explanation

Correct answer: B. hertz (Hz)

The SI unit of frequency is the hertz (Hz).
Answer: hertz (Hz).
Why not the others: coulomb (C): that is the unit of electric charge. kelvin (K): that is the unit of temperature (SI). ohm: that is the unit of electrical resistance.

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What is the SI unit of frequency? | Junior Cycle (Ireland)