The standard unit for frequency equal to one cycle per second is what?

The standard unit for frequency equal to one cycle per second is what?

• A. Hertz
• B. Newton
• C. Coulomb
• D. Joule

Answer: (A)

Frequency is how often something repeats per unit time, so the unit used to express it is the hertz, defined as one cycle per second (1 Hz = 1 s^-1). This unit is named after Heinrich Hertz. The other options measure different things: a Newton is a unit of force, a Coulomb is of electric charge, and a Joule is of energy. For example, household AC at 60 Hz means the current completes 60 cycles each second.

Frequency is how often something repeats per unit time, so the unit used to express it is the hertz, defined as one cycle per second (1 Hz = 1 s^-1). This unit is named after Heinrich Hertz. The other options measure different things: a Newton is a unit of force, a Coulomb is of electric charge, and a Joule is of energy. For example, household AC at 60 Hz means the current completes 60 cycles each second.