Lead, Lag, Say What???

Principle:  in a voltage vs. time plot where time increases to the right, events that occur later in time have larger time values and thus appear further to the right.

 

In the figure above,
red leads blue by π/2.
blue leads red by π/2.

In the figure above,
red lags blue by π/2.
blue lags red by π/2.

 

In the figure above,
red leads blue by π/2.
blue leads red by π/2.

In the figure above,
red lags blue by π/2.
blue lags red by π/2.

 

In the figure above,
blue leads green by π/2.
green leads blue by π/2.

In the figure above,
blue lags green by π/2.
green lags blue by π/2.

 

In the figure above,
red leads blue by π/2.
green lags blue by π/2.
green lags red by π.
green is 180 degrees out of phase with red.
all of the above.
none of the above.


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