Frequency counts full cycles per second, measured in hertz (Hz). A 50 Hz sinusoidal mains waveform completes 50 cycles each second and reverses current direction twice per cycle—100 reversals per second. 60 Hz gives 120 reversals per second.
Frequency counts full cycles per second, measured in hertz (Hz). A 50 Hz sinusoidal mains waveform completes 50 cycles each second and reverses current direction twice per cycle—100 reversals per second. 60 Hz gives 120 reversals per second.