Which of the following statements is NOT correct about different type of waveforms?
1
Bidirectional waveforms have both positive and negative signs.
2
The current or voltage for unidirectional waveforms or signals remains the same, although varying. It never crosses the zero line.
3
The periodic time for a square wave is still the time for a complete cycle.
4
Non periodic waveforms are those that vary and repeat the waveform.