Units of Period and frequency
Frequency:
Frequency is the rate of change with respect to time.
Change in a short span of time means high frequency.
Change over a long span of time means low frequency.
The power we use at home has a frequency of 50-60 Hz.
If a signal does not change at all, its frequency is zero.
If a signal changes instantaneously, its frequency is infinite.
Phase
Phase describes the position of the waveform relative to time 0.
Fig.a shows a phase shift of 0 degrees.
Fig.b shows a phase shift of 90 degrees.
Fig.c shows a phase shift of 180 degrees.
Only at Engineer's Knowledge
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