İs square wave AC or DC

Frequency: Like that of a sine wave, the frequency of a square wave is the number of times the waveform alternates in a second . The frequency used to be measured in cycles per second, but now the unit Hertz is used where one Hertz is equal to one cycle per second.

The waveform of a current describes the shape of one cycle of the current. The frequency of a current is how many times one cycle of the waveform is repeated per second , and is measured in hertz (Hz).

A square wave behaves the exact same way as a sine wave, in that as its fundamental frequency increases, you will see more cycles in a given amount of time . Square waves theoretically have infinite bandwidth.23 Eyl 2014