what is waveform, amplitude, cycle, time-period, phase & phase difference

what is waveform, amplitude, cycle, time-period, phase & phase difference in AC circuits of electrical engineering “EEE”.


The graphical representation of alternating quantities with respect to time is known as waveform or waveshape.


The maximum value, positive or negative, of an alternating quantity in half cycle is known as its amplitude. It is


One complete set of positive and negative values of alternating quantity is known as a cycle.


 Time required 10 complete one cycle is called time-period. T= 1/f

Unit of time is second i.e. T = second/cycle


It is part of time-period after the alternating quantity passed through zero position or it is phase angle position of quantity.

Phase difference

If two alternating quantities do not reach their zero value in the same direction simultaneously then they have phase difference. The difference of phase angle between two quantities on the same reference axis is known as phase difference.


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